Problem autocompleted with Ubuntu 11.10

[El_Java]

Hello!
I've just upgraded Ubuntu 11.04 to 11.10. I don't know what are the new things of this version, but now i've got some problems with Codeblocks, for example:
When I do some code like this:
int main(){
   int fd;
   return 0;
}
The compilator tell me an error that before upgrade didn't appear.

Well, the fact is that now Codeblocks doesn't autocomplete nothing of the #include files, only the things define in the file that i'm using. All the settings are correctly completed. What is the answer?

PD: Sorry for my english...