"Instead of using the NIST recommended curve points [ScreenOS] uses self-generated basis points..." [0]

The way I read this statement is that each device generates its own set of points. If this is the case, I don't see how it would work as a crypto backdoor.

If by "self-generated" they mean generated by Juniper once, well, thats fishy.

[0] http://kb.juniper.net/InfoCenter/index?page=content&id=KB282...

Edited to add: Upon further research, the latter possibility seems more likely.