In cmd and Powershell on my Vista machine, the underscore cursor blinks regularly. Pressing any key causes it to disappear for a moment, then resume blinking. For normal text entry, this is OK. But when using the left and right arrow keys to move the cursor to edit a command, it's really annoying.
My Windows 7 machine doesn't have this issue; the cursor becomes visible when the arrow keys are tapped. How can I fix it in Vista?