a bug in the game prevents my wizard or bard and priest from usuing there high level spells. :( i have the patch but it doesnt change saved games. when i get tosc etc and go on to bg 2 with my main character will this effect them or should i export my main charcter and start again which is fine by me.

I had the same problem with a corrupted game and I had to export and restart

I´m sure the bug only bothers you in BG1. BG2 starts from fresh board.