Thank you Paul for looking into it.
There is a clear difference here and I have an 2017 iMac which is pretty fast. Yet, I might have jumped to conclusion to fast since I also have this mouseEnter handler (before a mouseDown and mouseMove handler): on mouseEnter if the tool is "Browse tool" then lock screen start editing grp “Board” set the layer of me to top stop editing end if end mouseEnter … so a delay might occur here. What I observe 9.0.3 The mousepointer and the object is rock solid together. 9.0.4 The mousepointer is way outside the object before the move catches on. Thanks again Michael _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode