The second bug is in WASwazooAdaptor>>requestUrlFor:. In this case WAUrl is fed 
the printString of the #uri (an instance of SwazooURI) as follows:

 requestUrlFor: aNativeRequest
       | url |
       url := ((WAUrl absolute: aNativeRequest uri printString)
               decodedWith: self codec).
       aNativeRequest isEncrypted
               ifTrue: [ url scheme: 'https' ].
       ^ url

The problem occurs because WAUrl class>>absolute: expects the url to be url 
encoded, but the printString for SwazooURI prints the decoded url. Again this 
causes problems when HTTP special characters are in the input url. The other 
adaptors feed the 'raw' encoded url string to WAUrl, but the Swazoo adaptor 
does not ... SwazooURI does not keep the encoded source url around, so in my 
workaround I changed SwazooURI printQueriesOn: to reencode the query parameters 
...