@jellytriangle IE10 is supported as well, but Chrome's internal spellchecker/use of spellcheck attribute is buggy.
16 July 2012
JCE 2.2.4 released
This update fixes some errors in the Link Browser in Joomla! 2.5 and adds a few missing language strings.
Check out the Changelog for a full list of bug fixes and updates.
Installation and Updating
Updating to JCE 2.2.4 from existing JCE 2.x versions can be done using the JCE Updater, or the Joomla! Update Manager in Joomla! 2.5. Alternatively, follow the Installation Instructions for a new install or update.