Stay Stock For a While
I'm leaning toward rogue apps or virus, though certainly wouldn't rule out applying custom kernels or overclocking. If you have gone thru so many phone (replacements), maybe you should try to eliminate potential problems by staying completely stocks. Also when you go do restore account settings, some apps will restore via market (google), so try not to redownload some of those apps you had. Keep it simple and wait few weeks and let us know what happens. I'm sure I'm not the only one curious enough to hear more on this.
I'm leaning toward rogue apps or virus, though certainly wouldn't rule out applying custom kernels or overclocking. If you have gone thru so many phone (replacements), maybe you should try to eliminate potential problems by staying completely stocks. Also when you go do restore account settings, some apps will restore via market (google), so try not to redownload some of those apps you had. Keep it simple and wait few weeks and let us know what happens. I'm sure I'm not the only one curious enough to hear more on this.