<Ah.. the white stuff is almost assuredly not silicon grease, but rather
<titanium dioxide. It's commonly used as a thermal paste, and if the dust
<is inhaled it is highly toxic. As long as the paste is still plastic
<though you're fairly safe. It's when it's dried out you really want to be
<careful with it.
I think your confusing Berillium Oxide (BeO, very bad stuff) with Titanium
dioxide(commonly used to make white) which is nearly inert.
Allison