Chromium incognito window: Option 'Allow in incognito' for extensions doesn't work at start

[sma]

Ubuntu 12.04.4 LTS
chromium-browser Version 32.0.1700.102-0ubuntu0.12.04.1~20140128.864.1

I have two extensions installed ("Adblock Plus" and "Tabs to the front"). For both extensions I enabled the option "Allow in incognito" (see screenshot) (Instruction see https://support.google.com/chrome/answer/187443?hl=en -> Adjust extension options).

When I open chromium by using the Quicklist-entry "New window in Incognito mode", both extensions are *disabled* although, the checkboxes for the option "Allow in incognito" are selected. I have to deselect and once again select the checkboxes to make both extensions work.

Background information: When I first start with a regular windows of Chromium and afterwards start an Incognito window simultaneously, the extensions are enabled in the Incognito window as they should be. So the bug only occurs, when I first start with an Incognito window of chromium, and that's my preferred behavior.

This bug occured since the last but one version of chromium in Ubuntu 12.04.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.20.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-58.88-generic 3.2.53
Uname: Linux 3.2.0-58-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,resize,move,compiztoolbox,imgpng,snap,gnomecompat,vpswitch,unitymtgrabhandles,regex,grid,mousepoll,commands,animation,wall,place,workarounds,session,expo,fade,ezoom,scale,unityshell]
Date: Sun Feb 9 13:39:16 2014
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[sma (m-0622)]

The bug was fixed with version "33.0.1750.152 Ubuntu 12.04" of Chromium.