We're heavy users of Gliffy, recently the copy/paste between diagrams has just flat out stopped working.
This severely hinders our architecture work.
Everyone in the office that has tried this recently has run into the same issues (it just doesn't work). More-so if the thing we copied contains an image. Trying to copy/paste within a diagram anything that contains an image doesn't copy the image.

(The above shows the result [right] of pasting everything on the left -- within the same Gliffy diagram. Across diagrams you don't even get the circles, just a console log saying "No copyCommand for pasteCommand to execute!").
Wondering if others out there are having problems.
I'd report an issue but Confluence makes it rather unclear where you are supposed to do that.