A client of ours is experiencing the exact same problem/error.
The application (Live Support Operator) shuts down unexpectedly when an operator accepts a support-chat from a user.
Screenshot is attached. (Norwegian error)
Eventlog:
EventType clr20r3, P1 livesupport.exe, P2 1.0.0.0, P3 452411c3, P4 system, P5 2.0.0.0, P6 461ef191, P7 1f2f, P8 1bd, P9 system.net.webexception, P10 NIL
Hanging application IEXPLORE.EXE, version 6.0.2900.2180, hang module hungapp, version 0.0.0.0, hang address 0x00000000