Hi all,
I am also having a problem with the categories not showing in the k2 admin panel. I am using the latest version of k2 (dowloaded today) with Joomla 2.5.
Initially I was using Firefox as my browser. I added my first category, but it did not save. I repeated this 3 times, and each time after saving and closing, the category panel showed it was empty. However, when I went to the items panel, created an item and went to see if there were any categories to add it to, the category I had created showed up 3 times (from the items drop down menu).
So logged out and switched browsers to Safari. Initially Safari showed me all 3 categories I'd created in the category admin panel; however, after leaving that panel to do other management within Joomla and returning a few minutes later, the categories were again gone.
I found this forum post and tried selecting English as the language, but that made no difference (and it automatically refreshed to 'select language' each time... never staying on English... but maybe that's because English is the only option).
Anyway, those are all my details. Hopefully k2 can discover what the problem is and it will be an easy fix for all!
Thanks for the help and guidance k2!!!
Alina
