[boost] Are some of the trunk regression tests running in C++0x mode when they shouldn't be?

Looking at the Trunk regression tests, it appears that some of the GCC tests are running in C++0x mode when they shouldn't be. for example: Large numbers of the Sandia-gcc-3.4.6 tests are failing with the error: unrecognized command line option "-std=c++0x" If you look at the test results for assign, there are rvalue-reference related errors in toolsets which shouldn't have them. Looks like -std=c++0x is being specified when it shouldn't for some reason? Is something broken, or am i imagining it? Thanks, Richard Webb