- PHost 4.1a released on 31/Jul/2007
- PHost 4.1b released on 28/Oct/2007 (limited distribution)
- PHost 4.1c released on 20/Sep/2008
- PHost 4.1d released on 29/Apr/2009 (limited distribution)
- PHost 4.1e released on 25/Nov/2010
- PHost 4.1f released on 04/Nov/2012
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