Silverfast Ai Studio 6.5 and multiscan problems

[asf]

seems to be varied

tried to make a test scan last night, now it's awful with m-s as before AND bad without it in a new way (overly contrasty and jagged). will investigate more.

should have left it alone where i had it before this upgrade, no problems then

[asf]

so after a weekend of crashes and frozen photoshop and silverfast reinstallations i had to reinstall OSX. then i completely reinstalled silverfast 6.5 ... same result, when scanning at 2400 dpi it just crashed, hung up ps, quit ps, or gave "jagged" scans when it did manage to finish. tried it with cs2 and cs3.

so i reinstalled OSX again, reverted to 6.4 ai studio and no problems at all. can scan 2400dpi 48 bit from 4x5 negs easily as before (dual 2.0 g5 powermac with 4gigs ram).

maybe 6.5 with m-e not fully ready?