ExcelBanter - compaibility issues with tab-delimited files

My customer is starting to upgrade their pc's to Windows Vista. In the
past,
under XP and using Excel, they provided a tab-delimited file as input to
my
inkjet system that uses Windows 98. No problem!

Now under Vista, using Excel (2007) I can read the file, but it doesn't
recognize it as tab-delimted, this not formatting correctly. I open in
XP
on my pc, import into EXcel and then output as tab-delimited and it still
won't work. I put it out as CSV and it is fine.

The only problem using CSV is there is a comma in the City State field
that
must remain and it gets dropped even though it has quotes. My vendor
admits
it is a bug in their system and the workaround is tab-delimted.

Does anyone know of, or experiencing any compatibility issues with
tab-delimited files?

Thanks,

Bob