Yes, this was a problem even before the recent LaTex issues of 1 or 2 weeks ago. I guess there is no easy fix, or it would have been fixed already, and so we just live with it.
This is one reason why I avoid LaTex unless absolutely necessary, and instead copy-and-paste the symbols linked to in my sig. If you just need to use the occasional Greek letter, the copy-and-paste route is definitely preferable.
It's worth mentioning that we have LaTex mainly (perhaps entirely?) due to the efforts of one of the PF volunteer staffmembers, chroot.