Thanks for the suggestions, Ironman556. They didn't work for me - maybe it's some setting I've got wrong? I think I tried your 1st step before, but using menus as I hadn't learned the keystrokes. Same results so far - New Mail stays blank. After pressing Forward, my Copy button's greyed out. I have 2 of these petitions, from different friends. One has the >s on the left that appear on forwarded emails. But they're absent on the other, so I suppose all the previous signers of that one found a way to copy it?
open the e-mail right click the window and the click on 'select all' The text will then be highlighted blue, right click again and then left click on the copy option.
Then click on Create new mail, in the main window right click and select paste, this will then copy all the text from the original e-mail.
Type in the address in the 'To' box and then send it.
The other way to copy the text is to left click and hold at the begining of the text, the move the mouse down to the bottom of the page. As you do this the text will be highlighted in blue again. When you get to the bottom let go of the left button and right click and select copy.
Create a new e-mail as above and right click and select paste, add address and send.