I didn't see this reported in the bug database, nor did a casual web search turn this up:
When de-duplication is enabled on a Windows Server 2012 NTFS volume, the de-duplication engine replaces files that contain duplicate data with reparse points. Subversion then reports that those files have unexpectedly changed special status. For example: PS I:\temp\packages-2> svn commit svn: E145001: Commit failed (details follow): svn: E145001: Entry 'I:\temp\packages-2\Roslyn.Compilers.VisualBasic.1.2.20906.2\lib\net45\Roslyn.Compilers.VisualBasic.dll' has unexpectedly changed special status Once the files have been deduplicated, the workaround is to disable deduplication on a folder, then copy the versioned controlled directory to the new location. Repro steps: Enable deduplication on a Win2012 NTFS volume. Check out two copies of a repository onto the deduplicated volume. Wait for deduplication to occur, or force it to happen. Make a change to one copy of the repository. Attempt to commit with "svn commit". Jmr
