get-decoded-time gives incorrect time, zone, daylight-p

Hi,

I am working at Mumbai, India. I am using Allegro CL 8.0 on an AMD64 
based Linux machine. The function get-decoded-time returns incorrect 
time and timezone. The timezone returned is -5 when it should be -11/2, 
and the time is half an hour ahead of the real time. Also, the daylight 
saving time flag is T when it should be NIL.

CMUCL returns all these correctly, and so does the shell command 'date'. 
How can I correct this?

Chaitanya