Spaces Keyboard Freeze, Possible Insight?

Question

I’m one of the thousands who are struggling with the use of Spaces and the locked up keyboard.  When I use my keyboard to move between spaces, the Spaces image remains on the screen, freezing up my keyboard so that only limited buttons still work.  The most effective way I’ve found to combat this is to open Activity Monitor and quit the Dock, thus giving me full control of my keyboard back again.
However, in the past 24 hours I’ve discovered something that I thought might be of use to someone with more insight into OS X than myself.  I’m a Kensington Mouse user of more than 15 years.  Their Mouseworks software allows one to customize mouse clicks in any way they see fit.  Yesterday I noticed that when I go into the Mouseworks preference panel and indicate that I’d like to define a specific command for this or that button, that once I click in the space that allows me to type this command, my simple click therein immediately publishes anywhere from 1 to a half dozen characters, without my command.  It’s almost as if somehow characters are being stored in my click.  For example, I just clicked in this box and without me touching the keyboard, the letters Q and W suddenly appeared therein.
How does this relate to Spaces?  A few hours ago when Spaces locked my keyboard, I went into Mouseworks and tried this again, and when I clicked in this box which displays any command accompanying my click, only the letter Q appeared on its own.  I then canceled out of this box and pressed the letter Q on my keyboard, and Spaces unlocked!  Suddenly my keyboard was free.  A short time later Spaces locked on me again.  Going back into Mouseworks, the input box displayed, “Q W Up Arrow” after I clicked therein.  I exited out and pressed each of these keys and Spaces freed up again.
While I am a lifelong Mac user, I’m not an expert by any imagination, so I don’t know what any of this means, definitively.  It appears to me, nonetheless, that for some reason, letters and commands, keyboard keys, are somehow lingering into my mouse clicks, and it appears as if Spaces is freezing my keyboard because it’s waiting for those buttons to be pressed.
Is this a keyboard error? A preferences error?  An OS X error?  I don’t know.  But I thought that if I shared my findings here, someone might be able to look into solutions that I can’t conceive.

Answer 1

Okay everyone, let me add to my own post, another piece of insight in the last 24.  First, let me post an image that might help define what I've described above:
According to the instruction I've given the Mouseworks software, this box should just be "command Q", a command I've assigned to that particular mouse button.  But when I click my mouse in this box, rather than just placing the cursor there, the letter “Q” and the symbol “[“ are deposited, without my every touching the keyboard.  I then use my keyboard to change Spaces, and my keyboard get locked out.  But then I type in these two letters, the Spaces image disappears, and my keyboard is free.
If my findings in the last 24 are consistent, then here's what I've surmised: If the only button I press on my mouse is the left button, then the Spaces does not freeze on my screen and my keyboard does not lock me out. But if I hit any other button on my mouse, a button wherein I've told my software to press a keyboard combination, then Spaces does freeze, until I go back into Mouseworks, find out what key combination is lingering, and then type that combination.
One more thing.  If I've gone into Mouseworks and discovered the key combination, and then typed that combination of letters, everything is back to normal. In fact, if I immediately go back to that Mouseworks screen and click my mouse therein, there are no longer any lingering letters.  If at this point I unplug my mouse, I can uses Spaces and my Trackpad all I want, bouncing back and forth between any Space I wish by using the keyboard, and Spaces never hangs.
My conclusion: Is it possible that each of us suffering from Spaces causing our keyboards to freeze is using an external mouse?  That seems totally plausible.  Or is it possible this problem is caused by those of us who are using software to have key commands activated when we click a button?  Doesn't Apple's own Magic Mouse software allow for such?
I can't imagine that finding this for myself is unique to me.  I also can't imagine that everyone with this problem is using a Kensington mouse; that seems WAY too coincidental.  But I can imagine there's a solution somewhere in this revelation.  Is it the mouse software we need to delete?  Is it a keyboard preference that's causing characters to linger in the clicking?  Is this all some evil scheme of Steve Jobs to force all of us to use the Magic Mouse? 
Look into this for yourself!  Tell me what you guys find.