Text Stuck in Message Field Using an iPhone 4 and within Messages, a previously sent message text is stuck within the text box!

Whenever I open a new message window, the text box shows with the old message text pre-populated within it and I have to delete the text and then type out my message.

Even for SMS replies, the message field shows the old text always and I am having to delete it manually in order to type a new one.

This is happening with iMessage ON and OFF and I have restarted the phone as well as reset it from an iTunes backup but still the issue persists.

Is there away way I can erase the text permanently so that I get a blank message field when I send a new sms?
Had a similar "stuck in message" problem. Powering off/powering on fixed the issue....