[Entschuldigen Sie alle. Ich habe dieses Post geschrieben bevor ich bemerkte dass es gibt hier ein Deutsches Forum. Ich habe es jetzt in einem Englischen Forum auch geschrieben.]
Not a reply, but a "me too". Like Bjoern I use PPro CS3. Mine is on WinXP with all updates. I import PSD files as keying masks. I've never had a problem until this evening (27 Aug 2014). I tried to import a mask I've used many times before. And it has always worked before. Tonight PPro refused to recognize .psd as a supported file type, so it didn't show in the import folder file list. When I told PPro to show "all files *.*", it showed the file. When I selected it, PPro even showed the "import file" window, then displayed the "File Import Failure" window with Error Message: File format not supported. See the picture below.
This is a file I've imported into many previous projects with no problem whatever. In fact, I started with a project file from last year which showed the mask file in the project assets but offline! Even though the file had not been moved.
If PPro CS3 is as obsolete as Adobe claims it is, then who's been messing with it? And how can we get it "unmessed"?