lighty 1.5 not passing QUERY_STRING to fast-cgi

I'm using mod_proxy_core to run some fast-cgi apps, but I'm having  
problems with the QUERY_STRING env variable, which is not being passed  
to the application...
Also, somewhere in the docs of fast-cgi, it is specified that if I  
want to change the http status, I must set a Status header, which will  
be read by the mod_fcgi (apache) and will change the http status... is  
this the expected behaviour in lighty? if so, it's also not working in  
1.5.

Regards,

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Rolando Abarca
Phone: +56-9 97851962