[PD] wavetable distortion after save

[metafor]

hi list

i experience a strange behavior of pd saving wavetables. 
i am working on ubuntu edgy amd64, pd is compiled from CVS
a week ago. 

if i draw a wavetable and save my patch, the result is 
completely distorted when i reopen the patch. like some random sinus
curves. i do not compute audio and it's the only wavetabele in the
patch. i have pd installed on debian on a different machine, which is
not 64bit and there i do not experience this behavior. 

what could this be?

best
marc