It depends with what you call 'problems'. The bigest 'problem' for me is recent MS updates have prevented it loading 'Adobe Flash'. This due to a rights issue with a company called Eolas. Firefox is not affected for some reason, perhaps they don't use the same algorithms. Incidentally this 'problem' with 'Flash' affects all varieties of IE, not solely IE7.
If you want more information simply 'Google' for 'IE7 and Flash problems'.
I suggest you switch to 'Firefox' that functions asa well if not better than IE7, at least is not plagued with the 'Flash' problem and the somewhat bizarre new interface adopted by Microsoft for IE7.