VzW tech sup told me there's a bug that affects some Droid Charges so that they don't receive all incoming text messages, even though the sender may see in their phone's texting app that you in fact received the text message.

And tech support has watched a friend's text go from their phone to mine, and my phone send the acknowledgement to the network that it received the text -- even though my phone never displayed that I received the text.

Work-around: install app "Ghostly SMS". Its description on the market says something like it'll "catch" texts that the stock text app dropped. (My Droid Charge was dropping maybe 15% of my incoming texts.)

And while you're at it, do yourself a favor & install "SMS Backup and Restore". That way if your phone acts like mine and deletes ALL OF YOUR TEXT MESSAGES OUT OF NOWHERE, you'll be able to restore them from your backup. Without backup (or without rooting the phone first), your chances of data recovery (for texts) appears to be nil.

-Brian