Register_tick_function crashes Apaches. These are the specs.

tried it on combinations of win2k with apache 1.3.22 and php as sapi
with versions 4.2.2 , 4.2.3 and 4.4.0-dev 
and tried it with apache 2.0.43 with 4.4.0-dev too

the scripts was the example code from the documentation. It worked on our cobalt server but when i wanted to use it for real when working at home it crashed apache. 

crashes an apache thread (probably) with a memory fault .. couldnt read
from address 0x0etc . server does keep running though.

when commenting //register_tick_function() it works fine. 
even leaving declare(ticks=1) {......} in tact.

Vincent.