No Mobile Login

Question

I'm running two sites, both with the same theme and modules, both Joomla 2.5.22. With the test site mobile devices can log in, with the live site they can't. When a user enters their username and password and hits login, the page just appears to reload. Putting in a fake username or incorrect password results in the same thing. No errors appear.

I've tried jQuery Easy and while that fixed a problem I didn't realize was there, it hasn't solved the login issue. I've tried disabling modules (and clearing the server cache, as well as browser cache) and I just can't track down what the issue is. I can only test with an iPhone and an iPad, both in Safari and Chrome, ios is up-to-date. I have no idea how to progress any further, and I apologize if this is a dumb question.

pf-sgg.lunarius.net is the active site.
lunarius.net/pf-test is the test site.

Answer 1

I can confirm it returns an error message ("Username and password do not match or you do not have an account yet") in Android+Chrome. The only difference I see between both sites is Widgetkit's lightbox (enabled in live site). Try disabling it.

You may also want to test if error persists with default Joomla template (to discard a template issue).

Finally, you should seriously consider at least upgrading to Joomla 2.5.24, and if possible, to Joomla 3.3.3. As it seems to be a new project, I think 3.3.3 would be definitely the best idea (2.5 branch will be eol by the end of the year, and no more official support for it will be given by the Joomla Project).