There will not be any intermediate releases of trac-all before the freesurfer 5.2 release. A few different things are being changed at the same time and releasing a half-tested version would possibly cause more problems than it'd solve. ETA of 5.2 is within the next few months but I can't give you an exact date.
On Fri, 10 Aug 2012, Knut J Bjuland wrote:
When will FreeSurfer 5.2 be release. Is is possible to download the news version of trac-all and fsl_sub and use them in FreeSurfer 5. since I am using fsl 4.1.9.
Knut Jørgen
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer