freepascal random gives different results for x86_64 and i386

Hi there,

I wonder whether some already came across this: when compiling a
program under x86_64 the random() function call returns doubles within
the range of -0.5 to 0.5, while
when I compile it on a i386-machine it returns values between 0 and 1
as it should.

Any ideas how I can prevent this? Do I need a special compiler switch
under x86_64 to get the normal random() behaviour?

Thanks!

harga