I also get the "htc.com.bgp" error.
I don't use facebook. I use modaco rom, cooked in kitchen, no facebook or twitter og peep or anything like that. And no Sense either.
When i look in logcat, there are a few things, that i noticed show up a lot, when i get that error.
1. wifi tethering (though i haven't used it)
2. A short 1-2 ms bluetooth connection (seems bluetooth is trying to connect to something... bluetooth is always off on my phone, and i have never used it, or paired any units)
2. something about a keypad or keyboard or something (htc keyboard is not installed in my rom, if that matters)
I've tried different ROMs, and always get this errormessage, if there is no Sense on my ROM. A few times i also got the message, even if i had Sense.
I have now installed a facebookapp, because so many people mention it, logged in, and still get the errors. I just went to facebook.com as well, to uninstall everything that had to do with android, have to wait to see if that stops the error message.
I did not get this error message, when i used a ROM, that was ported to Desire from Nexus One (also Froyo)