Copy paste does not work in group discussions. Why is this? I try to link guys to things I think are interesting and I have to type long URL's by hand.

mmm with my mac with Safari and Firefox the cut and paste works well in group discussion. Have you tried with other browser? Let me know.

I tried a few different things to see exactly what does and doesn't work.

It works on wall posts and wall replies, it works on discussion replies, but when you CREATE a discussion, it will not let you copy paste. This of course is just with my Firefox. I'll be damned if I open internet explorer ever again.

I even tried to copy paste and complete the creation of the discussion to make sure it wasn't adding the paste, but just not showing it in the creation screen. After the discussion was created, the paste was still not there.

I've tried in firefox and safari. See the image of "create Discussion". Is this the page that not works on your pc?

yes.