Full-height drop-downs in epiphany cause window-management to fail

[Matthew]

I visited this site with epiphany:

https://venta.renfe.com/vol/index.do - to get it in English go via renfe.com, click "Welcome" then click the shopping trolley.

I clicked on the "Departure" drop-down to open it up. This contains a lot of items so expands to fill the screen vertically (unlike in Firefox where it only drops downwards). The menu populates and I expect it to be scrollable, selectable and clickable. It is none of these things, and also window management goes awry:

- moving the mouse to the top of the screen does not produce the menu bar
- holding alt down produces the menu bar but the buttons aren't clickable
- double-alt toggles the "type your command here" thing but keystrokes are ignored
- alt-tab doesn't work
- launcher will launch when mouse moved off left of screen but won't hide again (set up to auto-hide)
- launcher buttons aren't clickable
- "Windows key" brings up the search etc menu but buttons aren't clickable and there is a grey rectangle the dimensions of the epiphany menu superimposed

Killing epiphany restores normal behaviour.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: metacity 1:2.34.1-1ubuntu11
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Sat Sep 1 22:15:08 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: metacity
UpgradeStatus: Upgraded to precise on 2012-04-29 (125 days ago)