We used 2.0 with Adobe 6 without a problem but we now need pdf A and are using Adobe 10 so have upgraded to 2.3.
However when we stamp a PDF the resulting file only has a page blank except for the stamp.
Before and after attached.
Maybe the GUI version is old, we suggest you may download PDF Stamp Command Line v2.5 from following URL to try,
you can run following command line to stamp your PDF file correctly,
pdfstamp.exe -pdf D:\temp4\Rogs.pdf -o D:\temp4\Rogs-out.pdf -at VeryPDF
please refer to stamped PDF file in attachment.
Also, we will release a new version of PDFStamp GUI version after some days, we will let you know after new version is ready.