Can anyone confirm? Package management on an upgraded site is empty just shows "providers" in a green tab. Rest is white. Upgraded another site on the same server, no problem.
[ed. note: franklos last edited this post 12 years, 8 months ago.]
Sometimes, the packages take quite a while to show up at first, especially if there are a lot of them. You can also try reloading the page.
If that doesn't work, try the usual stuff if you haven't already:
Manually delete all files in the core/cache directory
Clear your browser cache and cookies
Turn off the compress_js and compress_css System Settings