Possible Duplicate:
Add increase/decrease tab indent buttons to the editor toolbarAdd increase/decrease tab indent buttons to the editor toolbar
When posting code inside a list you need to indent it by an additional level, i.e. 8 instead of just 4 spaces. The CTRL+K shortcut and the Code button of the editor use the regular 4-space indentation though which is annoying since it requires indenting all the code manually.