Antti wrote:
> Bitstreams must not contain a sync word followed by all 1’s. This
> condition might
> cause damage to the device.
>
> Is this an feature or bug? should this go into ERRATA and be fixed
> ASAP??
>
> Antti

Perhaps Spartan 6 can be added to this list!!

http://en.wikipedia.org/wiki/Halt_and_Catch_Fire