Motorola Droid X :: Camera Will Not Focus

Back in August 2011, shortly after an OTA Update, I noticed the focus function was no longer working.Sometime around October, I finally was fed up enough that I tried to do something about the problem. Unfortunately, my warranty had expired in Sept. Verizon Tech Support suggested a factory reset, so I did this.With no apps installed, I first tested the camera, and the focus still did not work. I reloaded all my apps and set up the phone, and, of course, this made no difference. At this point, I gave up and assumed this functionality had failed.

In November, I realized that the focus feature had begun working again. The only thing I'm aware of having happened is that the phone fell off of a coffee table onto the floor the day before. The phone was in a case and the table was about 18" high. I am sure that I did not load or unload any apps during that time. I may have recieved an update to an app, but since the focus did not work after factory reset, I doubt this to be a factor.The focus feature has been working up until today! I used the focus on NYE and all was well. No changes from then to when I discovered focus to be dead again.Here's a list of what I've done after the 2nd failure of focus:Shut down/battery pull Uninstall Shop Savy (uses camera), shut down/battery pull Install Vignette Demo to see if that app could access the focus. Nope.Uninstall Vignette Demo, shut down/battery pull Clear Data for Camera App under App Management, shut down/battery pull Force Close, then clear data for Camera app, shut down/battery pull.Lighting, ambient temperature, with/without case, inside, outside, upside down (j/k) doesn't seem to help.Can one of the Motorola guys (or anyone who knows for sure) tell me how the focus works? Is it a mechancial thing or is it all digitial? My theory is that either something mechanical is stuck or some sort of electrical connection has lost continuity.