This issue just happened to me and at least one other player before me:
Clicked “post turn summary” in TripleA… after a pretty long wait (longer than normal) it came back with an “unknown error.” I checked the game thread to see if it posted anyway, and it had not. Reposted the turn, and then the posting was accepted. Both postings now show up.
http://www.axisandallies.org/forums/index.php?topic=35702.75
The result is at the very top of page 6 (which is where the link will take you). I didn’t know if anyone was troubleshooting these things, so I thought I’d give you a heads up. The real issue is that if this problem is consistent that we will be doubling the number of posted saves, which doesn’t sound like a good thing…