I didn't see such bechavior in my test.

>if your print filename is 'something.pdf' and you you make
>report form somereport to file (something)
>you with realize that acrobat5 prints to a file somthing.pdf.pdf !!!
>
>until acrobat 4 you made something like
>
>myfile='something.pdf'
>finalfile='finalname.pdf'
>report form somereport to file (myfile)
>rename (myfile) to (finalfile)
>
>if you do the same under acrobat 5 you will find following files:
>somthing.pdf (=empty)
>finalfile.pdf (=empty)
>something.pdf.pdf (with the expected report)
>
>you can try following workaround:
>
>myfile='something.'
>finalfile='finalname.pdf'
>report form somereport to file (myfile)
>rename (myfile+'PDF') to (finalfile)
>
>now finalfile shows the expected report.
>
>I do not know if there is a way how acrobat does not add .pdf to your filename.
>If you find somthing let me know.