Latest release download: 
http://jbooktrader.googlecode.com/files/JBookTrader-6.10.zip
Release Notes: http://code.google.com/p/jbooktrader/wiki/ReleaseNotes

There are significant changes in this release, please review
carefully:

-- Fixed validation for the 10-level deep book. The 5-level book
always had 5 levels and the validation required equal number of bid
and ask levels. The 10-level book sometimes has an unequal number of
bid and ask levels and the equality rule is no longer enforced.

-- Upgraded to IB API v9.62. This will hopefully fix the problem of
the API sometimes throwing an exception when placing the very first
trade when running JBT in the trade mode.

--- Added cumulative bid and cumulative size columns to main table for
more direct monitoring

--- Updated sample strategies.  The dynamics of the 10-level book are
different from that of the 5-level book, so the parameters of the
strategies need to change. Additionally, the previously recorded
market data based on the 5-deep book should not be used for any
backtesting and/or optimization if the 10-deep book will be used for
forward testing and trading.

-- Minor refactoring in several classes.
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