There's a little behavior oin this issue, and I don't know why it happens =/

If I try to run the code below the input will not be filled:
---
driver.get("http://digitalbush.com/projects/masked-input-plugin/");
driver.findElement(By.xpath("//div[@id='tabs']/ul/li[2]/a/span")).click();
driver.findElement(By.id("date")).sendKeys("01012011");
---

Btw, if I put a command before sendKeys the test runs and fill the input field:
---
driver.get("http://digitalbush.com/projects/masked-input-plugin/");
driver.findElement(By.xpath("//div[@id='tabs']/ul/li[2]/a/span")).click();
System.out.println("");
driver.findElement(By.id("date")).sendKeys("01012011");
---

It just happens with Sel 2.5

Bisect shows it is caused by r13446.

A workaround is to do element.click() before element.sendKeys

The setCursorPosition call was added in r13404, my change in r13446 merely expanded
it to also include text fields (which had failing tests) as well as textareas and take
into account if the field was already focused.

We should figure out why focusing text fields on FF6 failed in the first place - r13404
is a sloppy workaround (as this issue demonstrates).

Ok, element.focus() in Firefox 6 places the cursor at the beginning of the element,
which breaks the contract of sendKeys() if the element is not focused but has some
existing value.

The solution is probably to click the element on the far right side instead of focusing
it in JS.

We can't do anything about this issue :(

Currently, sendKeys tries to *append* typed text to the existing text of a field. That
is, it puts cursor to the end of the field before typing.

With the masked fields from this sample it is wrong strategy -- the cursor should be
put at the beginning of the field.

We can't change the current behaviour, because it will cause *prepending* typed text
to the existing text for regular fields.

Fortunately, it is not impossible to deal with the masked fields -- just 'click' at
the field before typing, when you click it, jquery puts cursor to the correct position
and sendKeys successfully enters data to the field.

"Fortunately, it is not impossible to deal with the masked fields -- just 'click' at
the field before typing, when you click it, jquery puts cursor to the correct position
and sendKeys successfully enters data to the field."

Thanks a lot !!!