Setup cvs-HEAD hangs intermittently when downloading

[Igor Pechtchanski]

I'm getting intermittent hangs in latest build of setup.  Gdb backtrace
shows:
(gdb) thread 1
[Switching to thread 1 (thread 3084.0xb18)]#0  0x77e11b80 in USER32!DestroyWindow () from /cygdrive/c/WINNT/system32/USER32.DLL
(gdb) where
#0  0x77e11b80 in USER32!DestroyWindow ()
   from /cygdrive/c/WINNT/system32/USER32.DLL
#1  0x77e11e09 in USER32!GetMessageW ()
   from /cygdrive/c/WINNT/system32/USER32.DLL
#2  0x7171f4f6 in FlatSB_EnableScrollBar ()
#3  0x7171f2dd in FlatSB_EnableScrollBar ()
#4  0x71721ba8 in DrawStatusTextW ()
#5  0x0043683c in PropSheet::Create(Window const*, unsigned long) (
    this=0x22f9b0, Parent=0x0, Style=315555840)
    at /usr/src/setup-cvs/setup/propsheet.cc:193
#6  0x004250de in WinMain (h=0x400000, hPrevInstance=0x0,
    command_line=0x2332c6 "", cmd_show=1)
    at /usr/src/setup-cvs/setup/main.cc:370
#7  0x00456a43 in main () at /usr/include/c++/3.2/bits/char_traits.h:147
(gdb)
This is apparently somewhere inside the PropertySheet() Windows function.

Is this a known issue?  What would be the best way to debug this?
	Igor
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