PQ84359 is a cumulative APAR fix and includes the following fixes:
PQ35100 - CS2_FREEMAIN Fails To Clear Memory > 64K Bytes
PQ35212 - CS2_TRANSACT Timeout With Fox
PQ60773 - Improve Temp Res, Exception, Sema4 Handling in cs2calls.dll
PQ63117 - Semaphore Requests On NT Sometimes Fail Resulting In Hang
PQ66040 - Autoload of a Program Can Result in CS2START_CB Trap in memset
PQ66403 - CS2_HALT_RES Traps cs2icr00
PQ74852 - Poolfree/Pooldump Traps From TELNET Session And Hangs DAE
PQ84359 - Failure to Release Semaphore Causes CS for Windows NT to Hang