URLs eaten in photo descriptions

When uploading images, I frequently include links in my descriptions. When I do, I find that the "http:" is being replaced with a single hash mark, and I've got an extraneous quote mark at the end of the href value.

This is what I'm posting (well, it's an example):
<a href="http://www.google.com/">test link</a>

And this is what I'm getting on Flickr:
<a href="#//www.google.com/”">test link</a>

I've already trashed my preferences in an attempt to fix my problem with tags and descriptions randomly being eaten and it had no effect on this bug. I can reproduce this with 100% consistency on two computers.