- Figure out revision number of old good version
svn log http://svn.domain.com/app/branches/3_3_0 -r {2010-09-15}:{2010-09-20}
- See what code will be reverted
svn merge --dry-run -r 25951:25950 http://svn.domain.com/app/branches/3_3_0
- Perform the revision
svn merge -r 25951:25950 http://svn.domain.com/app/branches/3_3_0
- Commit your change
svn commit -m "Description"