Hey guys, there's a searingly boring play-by-play for this, but I believe the session issues may be fixed. The very short version is:
* We are forced through some major upgrades - hosting provider(s) no longer supporting very outdated versions of database, PHP, etc, and the forum software itself no longer supported
* Performance went to crud after some of these
* Figured out a way to get performance back
* This broke sessions in weird in unexpected ways
I know it all sounds sketchy and hasn't been stable in a bit, but with any luck now that we've upgraded, and gone through the growing pains, we can stay at this point for a long time.
On my end at least, I went from the same experience (endless session errors, occasional success) to it working consistently right now. Give me a shout in this thread if you are not seeing an improvement as well.