>One part of the improvements in SP1 caught my attention:
>
>"Parameters passed by empty placeholders default to NULL instead of .F. "
>http://msdn.microsoft.com/vfoxpro/downloads/VFP7_SP1Readme.htm
>
>Will this cause problems with backwards compatiability? I have lots of code that checks to see if parameters are logical or empty to make sure they were passed, and if I read this correctly, that code is now broken in all my COM objects?

It was Null in VFP7 RTM and restored to .F. in SP1.