If you had problems getting 3.1 to save data, it might have been because of your version of MySQL, but we've got a fix for that in 3.11. If you couldn't save options when creating a selectbox or checkbox or radio button, it's because magic quotes is turned on by your web host, but we've got a fix for that too.
There's many other fixes and a few behind-the-scenes improvements in this release. We hope the next announcement we make will be to show off exciting designs for the new admin interface for Formulize 4.