Could it be the space that was added in the string, rather than the space added between elements?

 Code:
'4.olddomain.net/DC=4,DC=olddomain,DC=net'

 Code:
'4.olddomain.net/DC=4, DC=olddomain,DC=net'


Just thinking out loud really. Trying to spot any possible differences.

Edited by ShaneEP (2014-03-10 06:54 PM)