Re: Windows install error on tw1.9rc1 - The fix!
You need to update the allow_call_time_pass_reference to "On"
(i.e. "allow_call_time_pass_reference = On") in the php.ini file
Use the Application menu, Admin, phpinfo to see where your php.ini file is
My gotcha
Beware that the allow_call_time_pass_reference appears twice in the php.ini file. Make sure you update the later. Thats is the one that is not aleady commented (;) out at the start of the file 
;){kind=link}
;){kind=link}