UML FAQ: How can I report a UML issue or make a UML change request?
The OMG UML v 2.6 Revision Task Force (RTF) is working on proposed improvements to UML based on feedback from the UML tool vendor and user communities. The OMG UML 2 RTF's Issue List (http://www.omg.org/issues/uml2-rtf.open.html) is public and is organized into open and closed issues. You can comment on any open issue by sending email to email@example.com. In addition you can submit new issues, including change requests, by sending email to firstname.lastname@example.org.