I found a problem in File Encoding, running C::B under WinXP SP3: C files containing western characters like è, é, ò, ... aren't displayed correctly.
You can simply reproduce the problem if you create a new C file with the following content
and save it as foo.c with File encoding >> System default (that is 1252 under WinXP),
After you close and re-open it inside C::B you should see
hello ий
The two western characters with ASCII codes 0xE8 and 0xE9 aren't displayed correctly.
If you force the encoding to System default, an Encoding Changed popup appears in the bottom right corner of the display