It is an AOL compression format. Sounds like it should work with IE. Here a link about it.
I don't think there should be any problems with IE, so you may want to contact AOL support about it.
Hope this is helpful.
my internet explorer6 will not display imige files the computer reads as .art files. if i use aol then aol displays them. while in aol if i right click and do "save as" it tries to save them as .art files even though thay are listed as jpeg files under properties. is there any way to fix this problem?