How to log APC Cache errors?



Hi.

I'm using APC 3.0.17 with PHP 5.2.5 on Linux.

I'm suffering some "white page of death" APC errors, and I'm trying to
investigate the reasons. But:

1) I don't find any APC support forum.
2) I don't find any APC error log. I'm browsing Apache error log (with
PHP 'E_ALL' activate) and don't see any line about it.

Any suggestion is welcome. Thank you very much.
.