gwaterfall is unuseable slow and lagging

[Sebastian Bator]

Gwaterfall reacts and responds very slow: It takes 5–10 seconds to open an drop-down menu or scroll down the window.
Changing the displayed font, reducing the rendered font sizes or toggling off options like hinting does not reduce the lag.
The window management is also affected: Moving the window or change the focus to another window is slow, too. When the focus is finally moved to another window, this responding as usual.

I experienced the issue never before the upgrade to Oneiric.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gwaterfall 0.1-4ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Tue Dec 27 11:43:29 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 PATH=(custom, User Name)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gwaterfall
UpgradeStatus: Upgraded to oneiric on 2011-11-30 (26 days ago)