JCE 2.0.13 has been released with a number of bug fixes including improvements in the JCE 1.5 to JCE 2.0 update process, fixes for the Styles, Tables and Paste plugins, support for empty parameter values - in some situations you may want to set a default parameter value to an empty value eg: Border Width - and an update to TinyMCE 3.4.5
A full changelog is available