There is a bug in this version of XChange where some of the exchange tickers have a null timestamp value. This is causing the ticker thread for some exchanges to crash.
For this reason I have not updated Github with a new version yet.
I have raised an issue with XChange (see https://github.com/timmolter/XChange/issues/100) so hopefully this will get fixed in the XChange 1.6.1 release.
Great to see you are on it cant wait for btc-e, the first profits will for sure go to your address!