[plt-scheme] How will mzscheme's version numbers increment from now on?

Hi everyone,

I'm updating the version-case PLaneT package so it can gracefully deal 
with mzscheme 3.99+.  I want to double check, though: in the past, 
mzscheme's major numbers were three digits, but this seems to change in 
the recent reshift of the version-numbering scheme.

Can I assume that a version number like "3.99.0.3" is equivalent to 
"399.0.3" in the old numbering system?