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[greg <1297978@xxxxxxxxxxxxxxxxxx>]

In case this is OpenGL driver related for some reason, I can observe
this on two different systems, but they both use Radeon GPUs,
specifically the r600g driver.

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https://bugs.launchpad.net/bugs/1297978

Title:
  Drag-to-maximize animation shows incorrect preview

Status in “unity” package in Ubuntu:
  New

Bug description:
  I Ubuntu 14.04, drag-to-maximize shows an incorrect preview when
  dragging a window to the top bar or the sides. The preview is simply
  the window pixmap scaled to the preview outline, even disregarding
  aspect ratio. The preview pixmap disappears after the animation. It
  looks really broken and glitchy.

  Earlier Unity versions used a related effect, but with nearly
  completely transparent rendering, and fadeout of the pixmap with the
  animation, which was mostly okay. Looks like the translucent fading is
  broken, at the very least. IMHO scaling the window pixmap this way is
  not useful at all, though, because it isn't a proper preview of the
  window after scaling.

  I have put up a demo video here:
  https://www.youtube.com/watch?v=k_Md_z0g4RE

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