Svn pool causes infinite builds because revision for some of the externals is wrong parsed. It always says that revision is changed from -1 although it should be 84343:

Started on Mar 12, 2014 7:43:54 PM
Received SCM poll call on plkrbuild02 for ManufacturingProcessIntelligence on Mar 12, 2014 7:43:54 PM
http://svnserver:81/svn/PDR/App/Branches/ModernUI/SharedItems/Resources is at revision 84,343
(changed from -1)
http://svnserver:81/svn/PDR/App/Branches/ModernUI/Manufacturing Process Intelligence/Implementation is at revision 84,343
http://svnserver:81/svn/pdr/App/Master/SharedItems/TestsConfigurationFiles is at revision 87,219
Done. Took 0.91 sec
Changes found