Failure of Wine to quit when a program ends.

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Recently my customer replaced her version of Wine with the current 
version.  One of the programs running there, DeScribe, appears to quit 
normally but doesn't terminate.  It continues to be in the background 
using no cpu time.  To get rid of it requires killing the program with 
System Monitor as there is no evidence on the screen that the program is 
running.  This appears to be a regression in Wine which has happened in 
the last nine months.  Has anyone else had this happen with any other 
program?  I am trying to track the exact problem and knowing that other 
programs behave this way would help.