I'm in Omaha, so there's no chance of getting any stray signal from an international tower here, and have 139 international roaming SMS messages that have shown up in the last 3 days. I called 611 a couple days ago and found out it's a known issue that just came up this week... also contacted AT&T via Facebook and they quickly replied to let me know they're pushing a fix today which should automatically remove the entries from all bills, saying "no further action is required on your part." My last billing cycle just rolled over on the 7th, though, so I'll be curious to see if any showed up on my statement when it becomes available.