Permission/Access issues after 1.7.3 Joomla Upgrad

Site was working fine until tonight.

I had public lists set up as menu items, and any visitor to the site could click through and see the user profiles.

Then I upgraded Joomla 1.7.1 -> 1.7.2 -> 1.7.3

The rest of the site is fine, but clicking on the profiles now throws up a login screen. I checked CB permissions for user profiles and lists, and nothing has changed. Interestingly, the other lists (selectable via dropdown box) also throw a login screen (the default Joomla one, not the CB one). It seems to have something to do with 1.7.3 not liking the URLs or something.

If you want to take a look, the site is at dev.yokohama-theatre.com

Go to Ensemble -> Members via the menu. Then click on one of the users. Or try to change which list is being viewed.

Any advice is much appreciated. Not realizing there was a problem, I had some people doing translation work on the site, and if I roll back, I may lose their work.

Cheers,

Squid

Do you have any custom ACL groups?

Yes. A bunch.

Make sure you upgrade to CB 1.7.1

Yes, I'm using 1.7.1.

please give exact details on how to reproduce the issue you are seeing on a clean Joomla 1.7.3/CB 1.7.1 website.

If you can reproduce and give us steps to reproduce then this will be escalated internally.

Thank you.