[NTG-context] setupinteraction breaks moving from 2001.11.13 to 2002.1.28

Interactions in a simple document that work under ConTeXt version 2001.11.13 break under 2002.1.28. The simple document and logs for both ConTeXt versions ("old" and "new") are attached - note the entry "check : missing '=' after '\let...'" in "new". Any suggestions about how to fix this would be most appreciated. -Dan