Launchpad question

Using the web interface with IE8 I am unable to cut and paste?  Is there some setup within launchpad to enable this?  I recently read a posted question and remembered seeing a related discussion in another post.  An attempt to "Copy Shortcut" for the related post and past it into a response wouldn't work?  Is there a way to refer to another discussion thread in a response without having to manually type the URL to the other thread?