Testing now. While waiting, please include your system information (as requested at https://github.com/ValveSoftware/steam-for-linux#reporting-issues).
EDIT: Confirmed on my Mint 14 64-bit install (https://gist.github.com/MrSchism/45ed161ede54ebc30909). Went to thread, selected page 2, hit back. No change. Right-click > reload kept it on page 2.
This is in the Steam client? Does it happen in a plain web browser?
It is the Steam client. It does not happen in a plain web browser like Firefox.
Still not fixed.
Closing as this appears to have been fixed.
Nothing extracted yet.
When I open a discussion with more than 15 posts, there are at least two pages of posts. When I switch to the second page and then hit the back button in the top left corner, the second page is still displayed and not the first one. When I hit the back button again, I come back to the discussions overview.
Can anybody else confirm this?
EDIT: I'm running Ubuntu 12.04 64 bit and Arch Linux 64 bit. It happens both times.