Converting from fiscal year to calendar year

We recently (JAN-2013)  converted our FA books from a July-June fiscal year to a calendar year without fully understanding the implications of this.  We created a new corporate book and tax books, exported all of our assets from the old books, and reloaded them into the new corporate book.  In our tax books, we use several different cost/table based methods (eg MACRS STL HY).   For any assets that were placed in service in the second half of a calendar year, the system thinks we are one year ahead in the rate tables than we were in the old books.  (eg