GTK buttons and progress bars appear as black boxes on Ubuntu Lucid 10.04, Firefox 6.3.6

What steps will reproduce the problem?
1. Create a new document
2. Add GTK progress bars and buttons to the document

What is the expected output? What do you see instead?
Expected output: widgets are rendered as normal
Actual output: widget are rendered as black boxes (black text on black
background) -- see attached screenshot

What version of the product are you using? On what operating system?
Pencil 1.1 rc2 on Firefox 3.6.3, Ubuntu Lucid Lynx 10.04.

Please provide any additional information below.
This seems to be an issue with the default colour scheme for such widgets:
changing the text colour makes buttons usable albeit with an incorrect
background colour. No workaround for progress bars.

Original issue reported on code.google.com by brunogi...@gmail.com on 3 May 2010 at 11:42

Attachments:

GTK-widgets-example.png

casper-m / evoluspencil

GTK buttons and progress bars appear as black boxes on Ubuntu Lucid 10.04, Firefox 6.3.6 #167