Need help with crontab

[restinpieces]

I'm writing a mod and I need access to crontab as user http. In the old images this was really ease but in the new 0.4 Beta I can't do it even if my life would depend on it

After getting trough all the PAM problems I now get the error message "/var/spool/cron/runeaudio.tmp.XXXXjmTSJI: Permission denied"

The command causing this is shell_exec('crontab /var/www/newcron');

I'm stuck, any help is appreciated.

[restinpieces]

f*** me. After losing almost all of my hair over this problem, I just thought to hell with it an removed cronie and added it again and lo and behold its works like a charm.

There is still this nagging feeling of "wtf just happened??" So if anyone can explain to me what was going on I would really really! appreciate it.