View Sorting

We are getting ready to upgrade 11,000+ users from 5.0.9a to 6.0.x. I am currently testing on 3 machines. I have designer access to my mail database. I am set up as a roaming user. On two of my machines, I have absolutely no problem. However, on the laptop, which was just installed from scratch, everytime I log into Notes, the preferred sort of my Inbox (descending, by date) has reverted to the default (ascending by date). Retain view column sorting is selected in my Preferences. I have even deselected the preference and reselected it, and every time I log out and back into Notes, the sort has reverted to the default. I can change the order of the columns, and line size, and that is retained; just the sort seems to be affected on this machine only. Does anyone have any ideas?

Thanks