Selenium on rails rake test:acceptance firefox problems on mac osx

Hi,

I'm using selenium on rails to perform my acceptance testing through
the browser (which is working out okay). I'm having an issue when
running test:acceptance with firefox as the target. It seems like the
process just stalls (waits forever).

I'm running Firefox/2.0.0.11 on mac osx (intel based). If I run the
tests manually on firefox everything works no problem, its only a
problem when invoked using test:acceptance. I'm already instantiating
firefox (in config.yml) using a seperate firefox profile: firefox: '/
Applications/Firefox.app/Contents/MacOS/firefox-bin -P selenium'.

I get as far as,

Starting firefox
"/Applications/Firefox.app/Contents/MacOS/firefox-bin -P selenium"
"http://localhost:3000/selenium/TestRunner.html?
test=tests&auto=true&baseUrl=http://localhost:3000/
&resultsUrl=postResults/firefox.yml&multiWindow=false"
^Crake aborted!

Any help is much appreciated.

Abdel