If you're seeing a .tm_ file, then either you have a script that's creating them using $tempfn or it's a leftover from a failed /write, /writeini, write to logfile, etc. If it's a remnant of a failed mIRC disk write, the file it should have been writing to is likely either missing or has no contents prior to the timestamp on that file.
I'm in view that it's a leftover from a failed /write, /writeini, write to logfile, because it appears after i exit mIRC sometimes.
