PHP and APC / PECL

After installing the pear pecl extensions I got a strange error:
PHP Startup: apc.shm_size now uses M/G suffixes, please update your ini files in Unknown on line 0

This problem is very easy to fix. Ensure that you php.ini contains apc.shm_size=128M and NOT apc.shm_size=128. The M makes the differences.