It is interesting that you are having that problem. It surfaces with my program from time to time, and I have not found a way to stop it. I am using ArcGIS 9.2, Editor level, and I make sure that I have closed out all attribute tables before I save and close out, and, sometimes the map opens with all att tbls closed, other times some are open. I have not downloaded SP2 or SP3. I have not found the reason for these openings, have not found any consistency to the problem, and discussions with ESRI tech support have not helped; they haven't encountered this before.
I simply close out the tables and go on about my business.....I have found that it is a nuisance, but doesn't affect performance or data.
You are the only other person I have heard that has this problem.
Bill; Eng Tech III (GIS)