FYI, I don't know that it is a bug yet but:
I just did a full remove and install of LLBLGen 2.5
Release 23-jan-2008 Build December 5th 2.5.08.0122 VS2005
I also downloaded
Template Studio v2.5 14-feb-2008 02142008
and
LLBLGen Pro SDK 11-jan-2008 01112008
I haven't really explored Template Studio before, but noticed when I selected:
C#, .Net 2.0, , Usable for all DB
SD.TemplateBindings,SharedTemplates.NET20
that there is a missing file:
dynamicRelation.template
from a forum search, it appears that the file is part of the 2.6 release...