when you save an image attachment from the attachment menu, we should try to use the memory cache, if possible. We don't currently get a cache hit because the url we store as the key for the image attachment in the memory cache is different than that constructed for the attachment menu. If possible, we should make the attachment menu url match the mem cache url. (we can't change the mem cache url because it needs to match what libimg uses). The attachment menu url gets chopped off at the part, whereas the mem cache url has "type=image/gif&filename=foo.jpg" appended. We could cons up the url because we know the type and filename but I worry that might be a little fragile, if the imglib url changes format. I'd like to find a way to stay in sync with that, but I'm having a hard time finding the code that's breaking down the url for the attachment menu.

not a dupe of bug 46233 ?

yes, this is a dup, and is fixed. *** This bug has been marked as a duplicate of 46233 ***

Verified dup.