1) Always use fully specified URLs for navigation: "http://www.google.com", not "www.google.com".
 WebDriver's behavior is undefined for URLs that are not fully specified.

2) Please post the SafariDriver's logs, as outlined on the wiki:
http://code.google.com/p/selenium/wiki/SafariDriver#Reporting_Bugs

I tried with "http://www.google.com" URL, but webdriver having same behaviour.

What about the second item I posted?

Please post the SafariDriver's logs, as outlined on the wiki:
http://code.google.com/p/selenium/wiki/SafariDriver#Reporting_Bugs

Also, including the stack trace from your .NET exception would be helpful. I've just
confirmed that using the 2.25 .NET bindings with the Safari extension compiled from
trunk works fine to navigate to Gmail, so there must be something in your environment
different from mine that's causing the issue.

Thanks for your response James.
I am still facing issue but error has changed, when I took latest Webdriver dll of
framework 3.5. (V 2.25.1) and latest code from (http://selenium.googlecode.com/svn/tags/selenium-2.25.0).
Now it is throwing error (Did not receive a connection from the Safari extension. Please
verify that it is properly installed and is the proper version.). This works perfect
when I use RemoteWebdriver and runs Java Server from command 
prompt. But I want to use Webdriver object.
Please let me know if I am doing some wrong steps while creating Safari extension.

Steps:
1. I copied latest code from http://selenium.googlecode.com/svn/tags/selenium-2.25.0)

2. Build Extension from CMD using dos command "C:\Selenium_2_25>go safari"
3. Add extension in Safari browser as mentioned in documentation
4. Created C# .Net sample application in VS 2008 using Framework 3.5
5. Invokes Safari browser properly but throws error at the time of object creation

Attaching .NET trace file for your ref.

Again, you really need to provide us with the SafariDriver's browser logs.  The instructions
for how to get them are on the wiki page.  These logs will most likely tell us why
the SafariDriver isn't working for you.

I am trying to navigate this URL:(http://www.linkedin.com). 
I also attached Console and Global Page LOG.

Attaching SafariDriver's Log.

Steel I am unable to proceed please help me.

Hy I am also getting the same error and the browserlog is:

[WebDriverException: Did not receive a connection from the Safari extension. Please
verify that it is properly installed and is the proper version.]
   OpenQA.Selenium.Safari.SafariDriverCommandExecutor.Start() +214
   OpenQA.Selenium.Safari.SafariDriver.StartClient() +120
   OpenQA.Selenium.Remote.RemoteWebDriver..ctor(ICommandExecutor commandExecutor, ICapabilities
desiredCapabilities) +58
   OpenQA.Selenium.Safari.SafariDriver..ctor() +76
   BroweserTest.Controllers.BrowseriaController.Browseria(List`1 BrowserType, String
SubmitUrl) in C:\Users\user\Documents\Visual Studio 2010\Projects\BroweserTest\BroweserTest\Controllers\BrowseriaController.cs:111
   lambda_method(Closure , ControllerBase , Object[] ) +227
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[]
parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext,
IDictionary`2 parameters) +208
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext,
ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter,
ActionExecutingContext preContext, Func`1 continuation) +263
   System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext
controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2
parameters) +191
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext,
String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext
requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
+12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult
result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+8967885
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
+184

please I need help on it ...............

I'm facing the same issue. It's really frustrating :/

I have installed the extensions as suggested.
Getting following error.
OS : Windows XP
Browser Safari 5.1
SeleniumTests.
SetUp : OpenQA.Selenium.WebDriverException : Did not receive a connection from the
Safari extension. Please verify that it is properly installed and is the proper version.
TearDown : System.NullReferenceException : Object reference not set to an instance
of an object.

Hi All,
I need help on this. I am using C# and VS2010.
I installed safari and got the developer certificate. 
I download the uncompiled version of safari extension from web and added it to the
extension builder.  I installed the safari extension as directed in the web and built
the necessary package as well.  <<AM I MISSING ANYTHING HERE : Do I need to add this
extension to the selenium REFERENCES, if so how to do it?>>

In the meantime, I have ensured that the safaridriver initiation code is not throwing
any error messages. It is opening the browser and sending an urls after that. Help
me please. 

Is this issue still actual?

Is this issue still actual?

Closing the issue due to inactivity, feel free to ask for reopening if it still can
be reproduced in latest Selenium version (2.37 at the moment)

I'm having this issue. This should be reopened.

Safari v5.1.7
Selenium v2.37.0.0

IWebDriver driver = new OpenQA.Selenium.Safari.SafariDriver();
diver.Navigate().GoToUrl("http://www.google.com/");
driver.Quit();

08:15:35.55 [safaridriver.extension.Tab] [8qx4aeikwm2a] Tab may be ready; waiting for
idle state
08:14:43.92 [safaridriver.extension] Creating global session...
08:14:43.92 [safaridriver.extension.TabManager] Registering new tab
08:14:43.92 [safaridriver.extension.TabManager] Set command tab to fqrmxtmd67av
08:14:43.92 [safaridriver.extension] Creating debug driver...
08:14:43.92 [safaridriver.extension] Waiting for connect command...
08:14:45.20 [safaridriver.extension] Loading module(page_base)
08:14:45.21 [safaridriver.extension.Tab] [fqrmxtmd67av] Tab may be ready; waiting for
idle state
08:14:45.21 [safaridriver.inject] Content page has requested a WebDriver client connection
to ws://localhost:53433/wd
08:14:45.22 [safaridriver.extension.Server] [jreuqcuzu182] Attempting to connect to
ws://localhost:53433/wd
08:14:45.31 [safaridriver.extension.Tab] [fqrmxtmd67av] Tab looks ready; notifying
listeners
08:14:46.31 [safaridriver.extension.Server] [jreuqcuzu182] WebSocket connection was
closed.
08:14:46.31 [safaridriver.extension.Server] [jreuqcuzu182] Failed to connect to ws://localhost:53433/wd
08:14:46.81 [safaridriver.extension.Server] [jreuqcuzu182] Attempting to connect to
ws://localhost:53433/wd
08:14:56.00 [safaridriver.extension.Server] [jreuqcuzu182] WebSocket connection established.
08:14:56.00 [safaridriver.extension] Connected to client: ws://localhost:53433/wd
08:15:35.47 [safaridriver.extension.TabManager] Registering new tab
08:15:35.47 [safaridriver.extension.TabManager] Tab opened: 8qx4aeikwm2a
08:15:35.47 [safaridriver.extension.TabManager] Ignoring open window event
08:15:35.49 [safaridriver.extension.TabManager] Deleting entry for tab 8qx4aeikwm2a
08:15:35.51 [safaridriver.extension] Loading module(page_base)
08:15:35.55 [safaridriver.extension.Tab] [8qx4aeikwm2a] Tab may be ready; waiting for
idle state
08:15:35.57 [safaridriver.extension.Server] [jreuqcuzu182] Executing command: newSession
08:15:35.65 [safaridriver.extension.Tab] [8qx4aeikwm2a] Tab looks ready; notifying
listeners

Try to disable your ant-virus, that resolved the problem for me.

I have the same issue and I think I have identified the cause. I've opened a new ticket
for those how are still interested as this on is tagged as fixed :
[https://code.google.com/p/selenium/issues/detail?id=6860]

Issue 6701 has been merged into this issue.