Great post by Jay Allen on fixing MT Bookmarklet’s for Safari on Mac OS X – works great!
Fixing the MT bookmarklet for Safari :: The Daily Journey :: JayAllen.org
One of the only drawbacks I have experienced in using Safari and Movable Type together is the annoyance of having to edit the javascript of the generated bookmarklet in order to make it work and the subsequent loss of ability to have selected text automatically inserted into the entry.