yep, i encounter the same flaws. in addition, i found the following probs:
1. as already described: the picture in Photoshop is flipped around (mirrored) in comparison to the preview window in Silverfast Ai
2. when opening the "gradation" dialog with the button from the "scan pilot", the lower buttons are disabled (light grey, not working). it works when pressing the button in the main window.
3. the histogramm seems to be changed from version 5.1 in comparison to ver 5.2 ???
when scanning the same slide, the histogramm in cmyk looks different in ver 5.2 from that one scanned with ver 5.1. ???
Volker.
P.S.: Gruesse nach Kiel! Ihr macht eine tolle Software
, sie hat gerade nur ein paar ?rgerliche Fehler 
Trotzdem: Viel Erfolg - in freudiger Erwartung von Korrekturen - Volker.