most of my users are students (from 13 years to university level). Most likely they are using PCs from their school labs (which in Singapore means using IE).
In singapore, most of the time, the IE is supplied with the PC by the manufacturer.
Hmm... perhaps one reason why the crashes could have happened more frequently is because my users use the forum like an IRC.... a lot a lot of replies and posts, so the odds of getting an error by IE is higher (perhaps).