Logoff sometimes doesn't work (2.0 client, 2.1 server)

[toby]

Again, using Orbiter 2.0 with UnionServer 2.1
(I'm beginning to think maybe the compatibility isn't quite there)
on *some* occasions I get this error in the client console log:

"12/2/14 16:21:53.708 UTC-8 WARN: [ACCOUNT_MANAGER] Logoff failed. The current user is not logged in."

However, looking at UnionAdmin, the contrary is definitely the case.
The logoff UPC never getting sent to the server means that as far as the server
is concerned this client definitely IS (still) logged in.

Unfortunately, that's all the information I have - and *sometimes* it does in fact work ok.