We recently upgraded to Articulate '13. After making minor changes to an existing course (created in '09) some of the shapes (rounded rectangles with no fill) have shifted slightly in the published course. In some cases the rectangle is now covering the item it is highlighting. The only workaround I think of is to make the shapes larger so that if it does shift it doesn't interfere with anything.
Does anyone know what is causing this and if there are any other workarounds? When upgrading is it a good practice to rename files so we are working with a "cleaner" copy? (I know when we ran into issues with PPT 2003 that often solved the problem.)