My advice to anyone posting a question, would be to do a "SEARCH" first... most likely the topic was already discussed and possibly a solution posted. Especially if you want a quick answer, it probably will be immediately at your fingertips!
Here is the discussion of Blossom End Rot which I found with a simple search...http://forum.earthbox.com/index.php?topic=186.0
Just a suggestion! Some people are not familiar with all of the features of a forum.
BTW: Welcome to the forum!