[1.0.5, earlier too] Moving the mouse spams errors in menu

[Zireael]

Once again, I got the dreaded bug where moving the mouse spams error messages in main menu and the game can onlly be killed via Task Manager.

This time, I decided to go look in the log. Never mentioning the fact that it managed to grow to 12 MB, the error was:
Lua Error: /profile-thread/Client.lua:22: module 'profile-thread.UserChat' not found:
no field package.preload['profile-thread.UserChat']
no file '/profile-thread/UserChat.lua'
At [C]:-1
At [C]:-1 require
At /profile-thread/Client.lua:22
At [C]:-1 require
At /profile-thread/init.lua:22
[ENGINE] Switching to turn based
Lua Error: attempt to call a nil value
At [C]:-1
Lua Error: attempt to call a nil value
At [C]:-1

The last two lines are repeated ad infinitum in the log.

[Zireael]

Any ideas/fixes/workarounds?