1.1.1 is out, resolving many issues, big and small:

-Major stability update for iPhone 3G, iPhone 3GS, iPod Touch 2g/3g running iOS 4 or later.
-Broken palindrome counter has been fixed.
-Bug which prevented buttons in the home menu from being operational after visiting Historical Stats has been fixed.
-Improve Score Counter logic to prevent crashes at high scores (10m+), and to make the counter not cycle so long on big words.
-Scores higher than 1m are no longer displayed in scientific notation.
-Improved functionality of Word Lookup: the system identifies most Proper Nouns and reports Proper Nouns to the player, system does not accept numbers, system kicks back words less than 4 letters or longer than 8 letters.
-Fixed a bug where you would get no new Hot tiles at the end of Level 15.
-Fixed graphical glitch on "?" in iPhone Sandbox.
-Some improved dialog messages, fixed new tip from being truncated on iPhone.
-Added a warning before you send a Tweet in iOS 5 single sign-in Twitter (can be disabled).
-Changed word definition Tweet from Sandbox to reflect that the word was formed in Sandbox.
-Updated word list.