setcookie issues in ie6 + firefox + opera

[Bannockburn]

---

I am attempting to set a cookie for an application;
setcookie('unid',$token,time()+3600,"/",".xyz.com",0);
This cookie does not work in ie6 (it is not related to p3p issues) but does work in firefox + opera. If i set the cookie without "time()", ie $cookietest=setcookie('unid',$token,3600,"/",".xyz.com",0); it sets (in the cookie folder) in ie6 but not in firefox, however it does not actually expire in 60mins in ie6. This has become a colossal pain in the backside. Anybody got a solution?

[Bannockburn]

After screwing around it appears i can set a cookie with blah blah..time()+(69000)....which is about 19hrs - this works on opera, ie6 and firefox. if i set it any less than 69000 - ie6 will not set the cookie - bizare stuff.