I have had 2, 5 and 7 and no problems with any of them. But I sure am interested in CS5!!! Wish I could afford to shell out the bucks for it.
That's not silly.
In my case I've only used the Editor. That probably makes a difference. As to PSE3 - I guess I just had a mental block against it. I don't remember why I even bothered to update.
When I upgraded from Photoshop 4.0 to CS it was a case of "having to". My Win 95 machine was having problems and I did like the idea of the easier way to do drop shadows in CS. So my buddy convinced me to go to XP and CS. In the meantime I could not get drivers to convert my Sprintscan35 (SCSII) or my Envisions 24 Pro. So now I have $3.2K (original costs) in scanners in mothballs - antiques.