Just before the end of 2012 ELAN version 4.5.0 was released. It introduces several improvements to the Transcription mode and to the user interface of the audio and video recognizers. It is now possible to have two tab panes for viewers in the upper part of the window in case of audio only transcriptions and one can now scroll horizontally in viewers with a timeline by using shift + scrollwheel or the (Mac) trackpad.
The main fixes are in the multiple file import of Toolbox files, in the merging of two transcriptions and in the annotations from overlaps or by subtraction features. The media player for mp4 files on Winows 7 and 8 should be more stable now.
The release can be downloaded here.