For a while now, Amarok has been saving 0 length files where it should be saving the downloaded images files.

To reproduce I simply open the Cover Manager.  Then I start fresh by selecting all the albums, right-clicking, and choosing "Unset Covers". (At this point an ls -l in ~/.kde4/share/apps/amarok/albumcovers/large lists no files.)  Next I  choose any album, right-click on it and select "Fetch Cover".  The "Images Found" window pops up correctly showing all of the found covers. I select the desired cover and press "Ok".  It looks as if its downloaded the cover but the image doesn't change from the default blank CD.

Also, when debugging output is being displayed in the console, the following is reported:

Bogus marker length
QCoreApplication::postEvent: Unexpected null receiver
Bogus marker length
QCoreApplication::postEvent: Unexpected null receiver
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x201f301

I'm really baffled at this bug. I've already tried completely removing my ~/.kde4 directory and starting over, but the bug is still there.  Any help would be appreciated! :)