Using the Ctrl Key and mouse click to change speed causes the pointer to immediately jump to the top left corner of the screen. This is probably a Vista issue. I'm running ver. 9 on another laptop with XP without any problems. I saw someone else with this problem on another forum without any responses.
To create a slomotion effect or to speed the clip up. I can use the velocity envelope or change the playback rate in properties to get the same effects, but I shouldn't have to. That's what the Ctrl Key in combination with the left mouse click while dragging the clip is supposed to do. It works on my laptop with XP. On my Vista computer it doesn't. I'm using Vegas Pro 9
Just check that your Keystrokes "list" is still listing Ctrl plus . . . and see what you have there? Could be you have a dirty rodent?? Is it an optical meece? Has it gone the equivalent of being cross-eyed?
I'm not seeing this behavior on Vista 64.
I agree with Grazie .. probably related to your mouse -- either new mouse or mouse drivers. If mouse is ok (or new/different mouse acts the same)..then check Options/Customize keyboard -- is it set to the default?
I finally figured it out. I had my font size set to Larger scale (120 DPI). I reset it back to the Default scale and it works fine. Thanks for responding. BTW this is a laptop not an external mouse.