[PHP] header() confusion

[pierre-yves]

Hello,
several months ago I discovered that under some IE 4.0 and upgrades of 4.0 the 
header() function would simply not redirect if 
you don't put exit() right after the header() call.  Now I'm discovering that header() 
does not work under netscape 6 if you put 
exit() right after!

How come this function is so dependant of the client? How can I avoid all this mess? 
Has anyone experience this?

py