I got the same error as skirby, after closing codeblocks, it crashes, without saving any config I had made.
I crashes even if I open CB and closes without doing anything or opening any file/project.
I'm using Windows XP sp2 PT-BR. I started getting this error on 3312 build, and it remains on 3315.
...Removing codecompletion.dll stopped the crash.
Another problem on winXP: when I open a associated file from Windows Explorer when CB wasn't already opened, CB opens with the file correctly, but locks the explorer. Dont know if this is known, as its minor issue.