[fullfat]

Had a complete lock up on my Lumia 920 today which I could only get past with a hard reset and have had a couple of problems since then (like the clock showing the completely wrong time!). The only problem remaining which hasn't been cleared by a reboot is that new text's that I receive or send have started appearing at the top of the conversation with that recipient rather than at the end.

It has taken me a while to figure out this is what was happening because I thought it was failing to send or receive messages. The live tile would tell me I'd got a message but when I clicked in it it would take me to the end of the conversation and there would be no new message there!

Any one else experienced this?

[Al_2]

I had a similar issue because I'd accidentally set the date on the phone to a day ahead of the actual date. Not sure if that'll help your issue...

[darquan]

I too had the wrong date and had the same issue

[fullfat]

That's the cause but I've no idea how the date is wrong as it's set to automatically set the date and time!
Since the lock up this morning it hasn't recovered well! It thinks it is the 29th October at the moment!