Some times when I install an application, the installation will fail.
However, the errors it throws are not only incorrect, but seemingly... random.
An example is, it'll fail and throw 'Insufficient storage space.' Blatant lie, I have plenty of space on the phone.
Another example is 'Package file is invalid.'
When I go to redownload the app, it usually installs just fine. On rarer occasions, it'll throw another (can't remember if it's the same) error, but then it'll install just fine.
I'm using stock market, on a stock Droid 3.