Incorrect display of "code"-blocks in my favourite forum

Question

Frequently I visit the Parallax-Forum about the propeller chip.
In these threats often there are examples in windows called "Code".
Text in these code blocks are not readable. In IE all is correct.
URL: http://forums.parallax.com/showthread.php?141165-Does-an-Object-have-an-address-that-can-be-used-in-SPIN&highlight=spin+address+pointer

Answer 1

In what way do these code section not display properly?
Can you attach a screenshot?
*http://en.wikipedia.org/wiki/Screenshot
*https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
Use a compressed image type like PNG or JPG to save the screenshot.
The CCS file specifies this for the font-family:
*Parallax,Menlo,Consolas,"Andale Mono","Lucida Console","Nimbus Mono L","DejaVu Sans Mono",monospace,"Courier New";
You can use this extension to see which fonts are used for text that is selected (right-click context menu: Show fonts in selection).
*fontinfo: https://addons.mozilla.org/firefox/addon/fontinfo/
You can do a font test to see if you can identify corrupted font(s).
*http://browserspy.dk/fonts-flash.php?detail=1
You can try different default fonts and temporarily disable website fonts to test the selected default font.
*Tools > Options > Content : Fonts & Colors > Advanced
*[ ] "Allow pages to choose their own fonts, instead of my selections above"