Apple was kind enough to grant us an expedited review, so the 2.0.1 bugfix update is available in the App Store now. This fixes:
1. Advanced Study list selection should now apply.
2. Changing study modes after studying at least one word should no longer lock up the app.
3. Manual adding multiple words on iPhone/iPod should no longer freeze the lower part of the study screen.
4. iPhone single day progress shouldn't be cut off any more.
5. Advanced Study list selection checkmarks shouldn't go crazy any more.
Sorry for the bugs in 2.0.0! Thanks for the great bug reports, guys.