Why can't I install apps when I have enough storage? In "Settings" > "SD card &amp; phone storage settings" under "Internal Phone Storage" it lists "Available Space" as 13.78MB.  I'm trying to install an app that is 2.38MB.  Why do I get the "Insufficient storage available" error message?  I clearly have enough space.

If it's relevant, my phone is an LG Optimus V.
Android devices actually have several different buckets of storage that can fill up independently, any one of them can cause an "insufficient storage" error.  This question:
Why is &quot;insufficient storage&quot; wrongly reported when installing an .apk via adb?
seems to cover the details and options best.