Many plugins report "DOES NOT EXIST OR IS NOT AN ORDINARY FILE"

[dotancohen]

When trying to run many plugins, I get the error "There was an error executing the plugin". Showing more details reveals "--- FILE /home/dotancohen/Desktop 1_003.png DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---"

Affected plugins:
3D rotate, Polaroid

Not affected:
Jigsaw piece 2 (though all it does is rotate the image clockwise 30 degrees, no jigsaw effect), Torn paper (runs but has no effect), 3D effect (runs, but just sits there spinning the throbber for a few minutes until I close it)

System:
Kubuntu 12.10

[doweller (do-weller)]

I had the same problem on Kubuntu 12.04.2 (up to date) and solved it by: Installing shutter from PPA https://launchpad.net/~shutter/+archive/ppa and the (re?)installation of imagemagick.

You should try it the other way round: (Re)Install imagemagick and if that does not help, try the PPA.