Infinite loop captive portal ?

[Nicolinux]

Hi everyone  ;)
I installed the Tue May 4 07:13:58 EDT 2010 build successfully and everything works fine (captive portal and radius authentication)

I tried to update it to the last version or install the new version and import my settings and what i got is pretty weird :
When i hit google for example firefox goes : pfsense, google, pfsense, google and finally firefox displays :
The page isn't redirecting properly

I got back to the 4 May version and import and all works out of the box.

What could be the cause of this ?