I'm debugging some of our tools, etc. in our switchover from Arbortext v5.3 for Unix to Arbortext v6.1 M010 for Windows. We have quite a few key mappings that I was hoping would not require any changes. The problem I'm encountering is that and any key combination of ALT plus a lowercase letter, e.g., ALT+c to insert a comment, does not work in the Windows version of Arbortext. If I key ALT+c Arbortext just beeps at me and does nothing. ALT plus a non-alphanumeric key, e.g., ALT+-, works just fine. Any thoughts on what could be causing this problem?