Just testet a bit:

on Mac:

Works fine in:
Opera v. 11.50
Safari v. 5.0.5
Chrome v. 13.0.782.41

Does not work in:
Firefox 5.0
Firefox 3.5.18
(I do not ha the firefox 4 version, so can not test in that)

This looks like a firefox compability problem - witch it is from firefox or invoice is hard to say, but it looks like it is a problem from invoice - if the old version works.)

The pdf i created (it is sent to the customer and administrator), but when pressing the pdf button in admin, the index.exe file is shown.

look at picture.

Hello

Using the 1.5.1 version of VM invoice, Joomla 1.5.23 and Virtuemart 1.1.9
When i press the pdf buttons in the invoices overview it makes a index.exe file instead of the pdf file.

WHY ?

Dearest
Jan