Well, I just tried compiling that one, which already includes wxAUI and UNICODE by default, and got a serious problem.
With the default plugins it shows a message box with title "E", message "A" and the error icon.
If I remove all the plugins and try again, Code::Blocks starts, shows part of it and then crashes. Since I disable -g I don't have a useful report.
Now I'm compiling it in ANSI mode and... it works!
The toolbar in 32x32 looks awful though. It looked better when I tried the wxAUI branch a few days ago. It's like the icons are taking even more space now. A few icons are lost too.