I've found that on my Galaxy Nexus if I replace a word it will revert back to the original word upon sending the text/IM. Try this out! I fix a word with a red line under it, or press and hold on another world and replace it with the correct word and then message looks perfect. Then I press send and the message that is sent doesn't include any of the corrections! Like the words revert back to what they were when I first typed them! Is there any way to submit a bug report to google?