This is really odd, but in the last few weeks (several weeks after getting my phone upgraded to the latest UK software), I've been getting odd behaviour on my phone.
When I go into the contacts list and click on the envelope to create a new SMS, instead of bringing up an empty message, it comes up with the text of an old message someone had sent to me! It's a different message each time...
Anyone come across this before? any ideas? It is getting a bit low on internal memory - around the 1M mark - but it seems odd that it would cause this!