>>Has anyone had a problem with PKZip corrupting a VFP 5 .EXE which was branded with Refox?
>>The following are the symptoms with an application that I am trying to update in the field:
>>1.) If I ZIP the output of the SetUp Wizard the application returns a message 'compiled with a previous version'.
>>2.) If I do not ZIP the output the application does not return this error.
>
>Which version of PKZip? Some early versions of 2.xx had bugs.

It is the licensed version 4.0 of PkZip for Windows.