IsBoxer update or last wow patch error

[Tin]

IsBoxer update or last wow patch too day are giving me error when exit wow

This application has encountered a critial error:

Fatal exception

Program: K:\world of warcraft\wow.exe
ProcessID:5388
Exception:0xC0000005 (ACCESS_VIOLATION) at 0023:06236D51

the instruction at "0x06236D51" referenced memory at "0x06236D51".
The memory could not be "executed".

Press OK to terminate the application

The error number is different from cliient to client that are closed

[Tin]

looks like it is ISBoxer - running 1 client with out ISBoxer = No error

last patch http://blue.mmo-champion.com/topic/173922/world-of-warcraft-fast-patch-410a-notes

Players using a single client to connect to multiple regions should be able to do so again.

[lax]

Inner Space development build 5433 is now available to correct this issue in development build 5432. To fix it, restart Inner Space and let it patch up. You can also switch back to the live build of Inner Space to avoid this issue.