@ollie. if its happening with just one of the characters you have, or even a few, it could simply be the server of the map you're trying to get into. i haven't been in-game in a week or so, so i'm not sure how the servers have been keeping up since the user bump, but i do know that certain map serves sometimes do crash. and also, if its in a private map, there could be things causing you to crash, such as weather files, or sometimes object files. also, when installing and reinstalling, are you deleting your old folder?
@rose
are you having the exact same problem? or a similar problem? it would be easier to either expand on whats happening to you, or to actually make your own thread.