I’m also having the same issues with copying and pasting from Word 2007 into Scrivener. Though pasting from Word to Notepad then into Scrivener does take care of the error.
According to LEE’s Jan. 16 update, the fix for that was planned for after Jan. 16 (after 1.55’s release). And according to the latest Jan. 24 update, it was indeed fixed and will be ready for version 1.6.