Please, vote here and describe the steps followed to reproduce the error, any detail that you provide may be useful for the nokia people to find and correct the error.
damn! yesterday I had this issue. I deleted all conversations and it is working then. after going through this thread and the comments in bug description, this bug is hard to reproduce.
in my case this happened for the first time. as far as i remember this happened to me, when the messages application is open and I received message alert on status bar and I clicked on the alert and found that message window is blank
I'm going to reproduce by sending multiple messages when messages app is open. lets see!
Ones U are aware of it U'll notice its been happening for a while and U just never noticed.... Most people don't use SMS thanx to Whatsapp, email, Skype etc...
Tracker has been a nightmare since back when I had the N900.
Conversations used to just disappear, and then when sending a text it would say Sending forever and never send, then closing the convo and reopening would not show your sent texts..
Same kinda weirdness occurs in the N9. One thing I wish Nokia had more thoroughly tested when under intense situations (lots of texts coming in over an hour period) ect.