I have two computers running MS Platinum 10. This is a problem on only one of them. It will not allow the creation of discrete envelope points, even if I follow the standard Vegas MS procedure for this. It's possible to insert the envelopes, but then I can't lay down the points I need. I've restored defaults using the regular method, but this issue persists. I have 23 other machines running 8 or 9 and as mentioned, one other running 10 and I've never seen this. Can anyone shed some light on the issue?