Error: Invalid Sequenced Queue

[Shendare]

I'm using Revision 552, database version 461, with all of the utils/sql/svn file sourced in, and was running fine as of last night on build 542 or so. Server and client both on Vista32, separate computers.

However, tonight, when I try to log into my server from the server select screen, I get this error message:

[Debug] [NET_ERROR] 192.168.1.100:56438: init Invalid Sequenced queue: BS 0 + SQ 198 != NOS 0

And the client locks up.

Is this a known problem with an easy fix?

I'm not aware of having changed anything outside of running the newest build of the server code.