same issue here running a fresh new K2 install on a fresh new joomla 2.5.6 install.

Can't see items nor categories in Chrome 21.0.1180.60 m but shows up on IE 7
Tried for the first time on Firefox 14 and worked.
Cleaning the cache on Chrome didn't worked.

I guess this may be some K2 issue with cache of its own interface components or browser-dependent javascript or something like that :-)

I see this is a K2 issue, as the off-the-box joomla Articles Manager doesn't have the same problem, nor any other extension dealing with its own categories.

We are having the same problem. Using Firefox 15.0.1 (Mac). Here is what I observed: After clearing browser cache, I relogin all items appear.. All categories appear. But when I go to the front end, select an image in the cart then return to admin panel, all items and categories disappear.

The cart should be designed for the browser I would think.

As we have been preparing for a presentation for a client, this is a big concern.

Hope there is a fix.

@channing

Since it's a CSS issue, use firebug in the administration to see what CSS rule is hiding the rows. If it's coming from K2 let us know so we can fix them.

I have the same issue. The K2 items and categories are displayed fine in the front-end, but they have disappeared in the admin back-end in FireFox. When I log in with IE9, they re-appear. How can I fix this issue?

You have to clear both your browser's cache and your Joomla! cache.

Krikor Boghossian wrote: You have to clear both your browser's cache and your Joomla! cache.

Unfortunately, this did not fix the issue. I cleared my FireFox browser cache, and then I went to Maintenance>Clear Cache and Maintenance>Purge Expired Cache and took action on both pages. I cleared my browser cache once more and visited the K2 admin items listing... they are still not showing up.

Any other suggestions?

Try to click Reset button at the top of the page.

BBC wrote: Try to click Reset button at the top of the page.

I clicked "Reset"... no change. :(

Why are at this forum disabled private messages ? Sometimes admin login info needs to be send to some users that want to help troubleshooting problems.

Or cant i see this option ?

Try this. If you have activated SEF disable it for a moment, and see if there are changes.

This topic is more than 1 year old, i dont think you have same problem as others.