run time error

i had tagasaurus malware and it was vanished by abri in malware section .. thank you but am still getting a runtime error line 55 want to debug? only when i log out of Yahoo.com mail beta version. if i switch to classic view i get a runtime error also line 55 do u want to debug? when i click on classic view but then when i log out of classic view i don't get the runtime error.
i was getting that message with other web based email when i signed out but not any longer only Yahoo persists. i was using ie 6 .. i don't use it much haven't for years i do use firefox and now after cleaning up my pc of malware it works just fine. i know "don't use i.e."; right?