comsec https firefox problem

Hi
Is anyone else having a problem with the https pages in comsec when using Firefox?

The portfolio, buy and sell pages, for example, should be secure. For me, they're not. They are OK in IE, and for banking sites and webiress, Firefox is OK so it doesn't seem to be a general security problem with Firefox.
I talked to comsec but they didn't understand and before I go back and they want to blame Firefox, I thought I'd see if anyone else has had this problem.

Thanks,