Moving CCleaner v5 around the screen dramatically increases cpu usage

CCleaner for Windows CCleaner Windows Bug Reporting
1

http://i.imgur.com/AbFMvAW.png

Moving the CCleaner window around spikes its cpu usage up to over 15% sometimes on my machine.

i7 4770 @ 3.84Ghz

2

Maximizing the CCleaner window covers an auto-hiding taskbar on Windows 8.1.1 if PaddedBorderWidth is set to 0