wine users - Mar 2007 - Starting wine with window size gives error

I am starting wine with the command:

wine explorer /desktop=Name,640x480 PPTVIEW.EXE myppt.ptt

and I get the following error:

[silentm@geisjdell PowerPoint Viewer]$ fixme:actctx:QueryActCtxW
80000010 0x3018b4d0 (nil) 1 0x34fb60 8 (nil)
X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  1 (X_CreateWindow)
  Resource id in failed request:  0x2e00007
  Serial number of failed request:  13
  Current serial number in output stream:  15

[silentm@geisjdell PowerPoint Viewer]$

If I start wine with 
wine explorer /desktop=Name,800x600 PPTVIEW.EXE myppt.ptt

It does work.

Why can I not specify a smaller window? Is this a bug? I am using 0.9.33

Thanks,

Jerry