Here it goes my two suggestions:

1- Provide a search function in order to find a particular word in the personal dictionary; Similar to the one you have in Resources/Glossary page);

2- In the Flashcards exercises (a tool that I found extremely useful) it would be great if it was possible to mark the words that we failed with some special label so that, later on, we could easily select them and launch flashcard exercises with those particularly difficult words.

Don’t miss interpret me… Chinesepod.com is the BEST!

Thks!