I find it strange - I use a fserve (sysreset to be specific) and still never had a crash.
If it's mirc then wouldn't everyone have the same problem? I'm beginning to wonder if there's something else running as well as mirc that causes it to crash... I usually have mirc, IE, FTP and perhaps my newsgroup program running all at the sametime and never experienced any problems.
Oh well I guess it's just a matter of waiting for the next release.