I do not know if this is related to the Gingerbread update, but I have noticed a grey circular icon with an X inside it next to some of my messaging threads. I have done couple of online searches, went through the manual and visited the Samsung website, all to no avail.
Anyone might know what this Icon might mean? I went through the threads and texts seem to have been delivered so its not a delivery warning.
If you pull down your notification bar, you should see that next to this icon, it says you have new voicemail. Does it say that for you?
On my phone I have new voicemail, and I have this exact icon for it as a notification.
If i'm not mistaken, i do believe that if you click on that, it should delete the thread, but I'm not sure, since i use google voice for my messages. hope this helps.
What I know is that the voicemail notification changed, and it is not at all apparent when I get voicemail. Seems to me there used to be a number on the Phone icon similar to the Messaging icon.