Hi,
I have a fairly default install of bbpress here:
http://www.asianamericanmedia.org/discuss/
... using the default the default kakumei theme. I noticed that if you click the little double-right-arrow next to "New topic in this forum" on an empty forum page, it gives a 404 error. The link is pointing to /discuss/topic/#postform, and I have pretty permalinks on.
What is this link supposed to point to?
Note: I just noticed the same problem on this support forum too! If you go to the ADD NEW topic page, there is a little double arrow next to the header "Add New Topic", pointing to http://bbpress.org/forums/topic/#postform - which also results in a 404. What gives?