Dragging around a cord? Are there bricks dangling off of it?
I tried the wireless route but found the inconvenience of recharging/battery changes outweighed the inconvenience of a cord that is barely noticable.
On the right click thing, it may be an oddball program that is causing the conflict, that you don't have open all the time and that's why you only get the error sometimes. Where are you right clicking when this happens (in a browser, in a directory on your hard drive, on a desktop icon)?
I was having trouble a while back using printscreen. Turned out having WMP open was somehow disabling the functionality in any app! It could be any little thing.
2c!