Our developers were able to reproduce the issue and they are working on the matter.
This does not seem to be OS related, so not a Vista conflict.
Having IDENTICAL problem here with multileaders as to what has been explained in this post. Has anyone also noticed when selecting a grip on the text box (eg: the bottom left grip), it no longer aligns the cursor with the very front of the text box? There is a slight indent now of the cursor once the grip is selected.
While we are working through fixes, have there been any reported problems with the Moroco tool? Had 3 fatal errors using this tool. Problem is intimitent though. I have sent reports to Autodesk.