You can...
Click 'post new message', upload it, copy the link, then just go back without posting and use the link in a reply.
(
The Glum Reaper cannot solve your problem because he has no jam,
Mon 7 May 2007, 16:55,
archived)
heh heh
I've been doing that for ages. I just kept quiet in case it was frowned upon!
(
finnbar has officially retired,
Mon 7 May 2007, 17:28,
archived)