Memory leak, what am I doing wrong?

[dceejay]

Well it's never been reported until now
but yes it would have to hold onto the old image until a new one arrives in order to compare the two.
Also it works across different topics - so if you had changing topics on the msg (maybe for some ID or other) - then there would be an old image per topic... which if they had something like date in (for no good reason I can think of then it could potentially grow indefinitely.