Logic Express 7.2.1 maintenance release
Logic Express has been updated to version 7.2.1. This is mainly a maintenance release, tackling compatibility and reliability with the following issues:
Intel Macs: ReWire and ReCycle support, Standard MIDI file export, OMF import, VSL EXS instrument compatibility
Blank Sample Editor window in some circumstances
Unexpected halt of software instrument output
Compatibility with Logic 7.1 songs
Direct playback of MP3 files
EuCon support for the Euphonix MC and CM408T control surfaces
The update should be available via Software Update, or you can grab it from Apple's download page.