The current stable version of subversion is 1.2.3 while the newest available version for BREEZY is 1.2.0 .
A look at the CHANGES (http://svn.collab.net/repos/svn/trunk/CHANGES) of subversion reveals, that there are important bugfixes and improvements since 1.2.0 . Some examples that causes problems for my use case with server and client - and would urge me to make my own build:
* fixed: 'svn merge' memory leak (r15233)
- fixed: mod_dav_svn bug sets content-type incorrectly (r15046)
- fixed: mod_authz_svn being overly restrictive (r15463)
- improvements to 'svnmerge' utility (r14008,-458,-587,-632, r15329,-340)
By the way: The version 1.2.3 of subversion and the corresponding sister packages made it already to the dapper pre-release. Thus the version 1.2.3 should match to the overall ubuntu build process.
Thanks