Log-in problem using Firefox 3.6.12

while the login on the offline page is ok in Safari and Chrome, when using Firefox (3.6.12) there is no response to the "Login"button (Firebug installed, but switched off/not in use).

Any idea what that might be about?

Thanks

(Joomla 1.5.22, myStore 2.0.11, OS X 10.6.5)

Sorry, seems to have been a DNS issue on my machine (had a few other wired things going on as well). Simple re-start "fixed" it.