[boost] VC10 config - some regressions in several libraries

Just a note that the recent changes to the VC10 config has produced several regressions in a number of libraries - I think these are all related to the use the rvalue references and move semantics. At present I can't say whether these are caused by bugs in VC10 rendering it's rvalue refs unusable (in which case we need a better test case in Boost.Config), or whether our library code isn't mature/portable enough yet given that this is a new and relatively untried feature. Can library authors making use of this feature investigate so we can decide what should be done here? Thanks! John.