I've temporarily disabled the live preview when posting in the DaniWeb editor.
I've been really looking seriously into why contributions to the forums have been ever-decreasing and so poor lately, and I was able to trace it back to a complete night and day difference the day that we switched from vBulletin to our own editor.
I reviewed some of the history from around that time, and there were a few complaints that the live preview was really lagging on slow computers. I dismissed the issue because we use the same live preview script as Stack Overflow does, and they don't seem to be having any issues. However, I thought it can't hurt to run a one or two day test and see if this really is the cause of our problems. If so, it's a rather easy fix to all of our troubles, wouldn't you say?