Somewhere there's another thread in which I inquired regarding these UA's.
I had a portions of my limited white-listing that was denying them access and it was quite difficult to make a determination of precisely what line what was the cause.
I've widget users who are constantly on the road (AOL; aside below) these users need local dial-ups across North America.
(It's similar to users that only use their YAHOO email portal to access the web)
In some instances they use their own laptop in their traveled location and in other instances they may use another's machine.
When they access their MSN account the UA variations are added and are different from when they are home-based. . . and when they access their account without using the MSN web-access-portal (i. e., IE and OE a with direct ISP-POP configurations).
Please forgive me as I'm not aware of terminology for the difference in this access.
Here are five of the added UA's that I accumulated in April 2008 (I've since since more variations):
MSN Optimized;US; MSN Optimized;US
MSN 9.0;MSN 9.1; MSNbMSNI; MSNmen-us; MSNcIA)"
MSN 9.0;MSN 9.1; MSNbMSNI; MSNmen-us; MSNcOTH)"
MSN 9.0;MSN 9.1; MSNbQ002; MSNmen-us; MSNcIA)"
MSN 9.0;MSN 9.1; MSNbVZ02; MSNmen-us; MSNcOTH)"
I've many widget users that have kept AOL accounts for years because of the traveling access of dial-ups.
This past year, I'd simply has enough of AOL (when visitors were refreshing pages 10 or 20 times in succession within second or AOL was caching items (pages and images) that I did not desired cached and place restrictions on AOL visitors.