Sorry about that. I just updated the readme to include the latest changelog. It says:
= 2.4.1 =
Release Date: 4/4/2010
* Standalone mode prevents li-element from being added when used in line. This also restores functionality that was in 2.3.5.
* Fixed event insertion bug where events may not be saved if the total number of events is larger than a certain number (I never did figure out what that number was…but it was probably around 4 or 5).
* Updated serialized output for the commented out file out serialized function.
Also, in case you’re interested in the nitty gritty details, you can also checkout the Official Trac Revision Log: http://plugins.trac.wordpress.org/log/countdown-timer/
