I too started having problems with data disappearing (actually just being blank, it was still there) with RM 3.2.6. I entered my problem on the forum (see vbible) but apparently no one could help me. I just bit the bullet and purchased RM 4 and my problem was fixed. Version 4 has a few extras that make it worth the twenty bucks.
I am using Rootsmagic 3.2.6. While on the FAMILY screen and I use the 'left' or 'right' arrows to move through my data, ALL of the data goes blank. I have to close Rootsmagic and call the file up again. If I call the same file, I get the error message "A sharing violation occurred while accessing . . .". I have to call up another file first THEN call the original file to keep from getting the error message. The 'blank data' problem happens on all my databases. I have tried rebuilding the indexes but Rootsmagic closes without rebuilding the indexes. I have tried making a GEDCOM file and rebuilding the database from that and that doesn't help. HELP!