The OpenMPT source code repository has been migrated from sourceforge.net to openmpt.org on 2015-07-27.
The last known good (and equal to the new repository) revision in this repository is r5414 from 2015-07-14 (and EXPLICITELY NOT r5415 as one may be tempted to guess).
The new repository root URL is https://source.openmpt.org/svn/openmpt/ .
The repository UUID has been kept the same, thus 'svn switch --relocate' will be able to handle the transition for working copies IFF they are still older than or equal to r5414; otherwise, please do a clean checkout of the new repository.
Please refer to http://forum.openmpt.org/index.php?topic=5510.0 for further information and updates on the migration process.