Error message when trying to open PDF documents in browser. (Adobe Reader 9)

Hi Adobe team,

I do have a problem with the new Adobe Reader 9 version.
The following screenshot pops up, everytime I try to open a PDF document:


Source file: http://dl.getdropbox.com/u/16751/adob...

I'm not quite sure, if the problem is caused by the Adobe Reader or my recent installation of Nuance PDF Professional 5. I use Microsoft Windows XP Professional SP 3 (32bit).

It could also be an issue with the Adobe Reader Plugin in both Firefox 3 and Flock v.1.2.3. Additionally it could be a problem with the "PDF Download" extension (v.1.0.1.2) I use in both browsers. The problem happens both with the "Use PDF Plugin" and the "Use this viewer" (Adobe Reader 9) option. But I doubt its a browser problem, as this error also shows up in Opera and I can't open any PDF in IE7 too, although there is no error message showing up.

Thanks for your help in advance.

Kind regards.