For me the Chrome update messed up my pop ups and mouse over menus.
When I mouse over the "My Ebay" menu and menus on other sites they do not appear correctly.
On Ebay when I click on a tracking number you are supposed to get a popup that displays tracking info. It appears but is incomplete.
On http://www.titantv.com clicking on a show title is supposed to give you a pop up with the show description. It pops up but is torn...like a page torn in half with incomplete info.
I uninstalled Chrome 20.0.1132.47 and re-installed Chrome 19.0.1084.52 and it fixed it. I done this two times for testing purposes.
Also, rebooting, logging out etc...I tried that and Chrome 20 might work ok for one menu or pop up then it goes stupid again. I tried this several times too.
The only thing that fixed it was re-installing Chrome 19.0.1084.52 again. If you have this problem try this.
I don't know where to get it...I already had it. When I goto google to download chrome it wants to give me a .deb package. I can't find links to older versions, just ones named google-chrome-stable_current_x86_64.rpm.
Also to use an older version delete the /home/user-name/.config/google-chrome/ folder or you'll get a user profile error. Make sure to back up your book marks.
I reported this here even though it is most likley a Chrome bug so people could fix it if they have these problems.