Drawing line randomly jumps to edge of screen in Gimp with Wacom Bamboo Fun

[Kody Ivan McCarthy]

When using Gimp 2.6.11 and a Wacom Bamboo Fun tablet, the drawing line randomly jumps to the left, top, or top right corner of the screen. The cursor itself does not move, nor does this problem manifest in any other program.

The stylus, eraser, cursor, and pad are all set to Screen mode in the Device Input dialog. This error does NOT occur when set to Disabled.

The problem appears more pronounced when drawing straight vertical lines, but also occurs to a lesser extend with horizontal lines and an even lesser extent with curved lines. Attached is an image that illustrates the problem; the image shows the quick jumps while drawing circles and lines.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gimp 2.6.11-2ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
Date: Wed Oct 5 23:18:25 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gimp
UpgradeStatus: Upgraded to oneiric on 2011-09-16 (19 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.