Graphical glitches when starting a gesture (Chrome beta)

[GoogleCodeExporter]

What steps will reproduce the problem?
1.  Go to any website (I observed it prominently on stackoverflow)
2.  Draw a gesture
3.  Observe glitches

What is the expected output? What do you see instead?
I expect that when a gesture is drawn, the sole visual effect I observe is the 
gesture being drawn.

I do observe my gesture being drawn, but also two other effects.  They are both 
extremely short-lived.

The first glitch only occurs the first time a gesture is drawn on a given page 
load.  It manifests by rearranging some of the contents of the page, and 
immediately the contents are returned to normal.  I cannot be clearer on how it 
rearranges the contents because it happens so quickly, but there is obvious 
movement of elements on the page.

The second glitch happens each time I draw a gesture.  When I start to draw a 
gesture, the last gesture I drew is displayed, then it hides itself immediately.

Neither of these glitches interfere with functionality; they are purely 
cosmetic.

What version of the product are you using? On what operating system?
0.15.4.12
Windows 7 64-bit
Chrome 18.0.1025.11 beta

Please provide any additional information below.

To reiterate, the glitches are only visible for a fraction of a second; screen 
capturing software failed to record them.   I've reproduced the problem on on 
two systems.  My systems recently upgraded to Chrome 18 beta, so that may be 
related (maybe even a Chrome bug).

Thanks for the great extension!

Original issue reported on code.google.com by michael....@gmail.com on 11 Feb 2012 at 1:11

[GoogleCodeExporter]

After looking more thoroughly (or at all :) ), this appears to be a duplicate 
of #580.

Original comment by michael....@gmail.com on 11 Feb 2012 at 1:17