You can just use < quote > tags and just copy the relevant portion of the post. For example:
Mr. Cheesecake Wrote:
I have a lovely bunch of coconuts.
Yes, I know it's stupid that we need a work-around for this, but half of the mark-up related features are broken anyway. Just try editing a post with multiple links to see what I mean, or even just click the "Preview Message" button from the Quickpost form. :P
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"its a good day to do what has to be done by me and help my brother to defeat the enemys" - John Freeman