2.7.6
Restored support for G3/G4 class machines - bad xcode - BAD! (Sorry about this hickup dear users)

2.7.5 Snow Secure
Supports 64bit kernel of Snow Leopard
Secure install, no longer requires to be run from boot volume
Can be run by normal (non-admin) user

2.7.0
Experimental Support for 64 bit kernel
Initial rewrite so authentication is as per Apple guidelines

2.6.6
path and process filters can be exclude or include
can filter out invisible (DOT<name>) files
can filter processes based on which application is frontmost
Minor bug fixes

2.6.5 - Missing events bug fix (some events were quietly being ignored)
Cosmetic improvements - crisper icons in table, core animation in filter
Help now comments on Apple's fseventd (which has nothing to do with this app), and uninstalling

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2.6.2 - Minor Bug fixes - removed noisy debug code
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2.6 Filtering

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Advanced filters (event, process, path, etc) can be applied to all views
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Unified functionality into toolbar, with some nicer icons
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Extra preference added to revert to old style of tree

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2.5 Interface redux

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Improved layout and clarity of tree
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Fixed incomplete printing bug and other various minor bugs

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2.2.2 Usability bug fixes

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Donate window will NOT show once you've checked the donate box!
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Sparkle update fixed (removes need to force-quit application to complete auto-update)

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2.2 Bug fixes, Sparkle AppCasts updating support.

2.1 Leopard support - including XATTR fsevents and monitoring via official FSEVENT API. Also now able to save results as log file.

2.0 New Gui with table and inspector, can now track up to 10000 events, new experimental list of all open files