About the remote scripts, nothing unusual : mainly on text/notice/rawmode/whatever events, some ctcp and raw events...
No external DLL nor COM stuff, no sockets...
Though it can still be these very "simple" events that make mIRC crash (as the infamous "ON *:CLOSE:=:window -c = $+ $target" that makes mIRC GPF too, see thread)
But it'll be difficult, I think, to isolate the "bad" script line, if it turns out the crash is caused by a script command.

Anyway, I haven't tried to run mirc with no script loaded, but as the bug can take days to appear with scripts loaded, It's be difficult, I think, to tell if it can happen without scripts... It would need tu run mirc without scripts for maybe one month, and *really* using it, to finally be able to say "ok, maybe it only happens with scripts".

That's why I wanted to know if it happened to others, as it may be easier to search for common things between configurations that make the bug appear, than try to track the bug down myself alone, because it really seem to happen randomly...