strange result from contrib/seg regression on windows

I am seeing this (among other things) when running the seg contrib 
module regression:

***************
*** 418,425 **** ERROR:  bad seg representation DETAIL:  syntax error at or near "e" SELECT '1e700'::seg AS seg;
! ERROR:  syntax error
! DETAIL:  numeric value 1e700 unrepresentable -- -- testing the  operators --
--- 418,428 ---- ERROR:  bad seg representation DETAIL:  syntax error at or near "e" SELECT '1e700'::seg AS seg;
!  seg
! -----
!  1
! (1 row)
! -- -- testing the  operators --


Does anyone have a clue why? Can it be fixed? (I'll keep digging, but I 
thought someone might be able to say immediately what it is.)

cheers

andrew