Yes, consistent in all browsers/platformsRepro Steps:
1) Visit forum home page
2) Find the "-" button at the top right of a category and click it to hide that forum
3) Reload the page and see that the forum is visible once again without clicking the "+" buttonExpected:
The forum would remember it's last expanded/collapsed state after reloading the pageSystem info:
Windows 7 x64, Firefox 6.01, Adblock Plus and Noscript (both allowing all on OCN domain)URL: www.overclock.net
Note that this is a sample report of a bug that was reported and fixed in November 2011. It is not a currently active issue.