I can't work out exactly what is doing it.. but it is still "broken" on my usual work PC.
Something is making IE9 put the copied text (from the colorized div) on the clipboard without any line breaks.
I've been looking on the web, and there are a million different postings in various forums about very similar issues, but none of the solutons I've seen and tried have worked or directly apply to me.
For me, a temporary way around it is to load this forum using IE's compatibility view and then clipboard copy/paste worked with line breaks, so I can live with that for now until I find the real culpret.
Regards,
....IFICantBYTE