Empty window left when closing application

[<luc...@co...>]

   Hi, I've encountered a strange behaviour that happens after closing  
the main window of a program (PowerTerm Interconnect, a terminal  
emulator). After closing the main window a new window opens up with no  
content at all. It stays minimized and out of sight until I move it  
(by right-clicking on the task bar and selecting "Move Alt+F7"). Then  
I can resize it to see that it's empty, it also hasn't any title.
   When I perform "xprop" on this window it displays:
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW

   I am clueless, any suggestions??

   Thanks in advance,
   Lucas Vieites

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.