Many accumulators tests are now failing on both trunk and release. I have tracked it down to recent changes in Boost.Random. I don't know for how long this has been happening. The accumulators tests use the lagged_fibonacci607 random number generator. The tests work by sending a large amount of random data through various statistical accumulators and checking that the results are within a certain tolerance of what they would be if the data were actually random. In Boost 1.45 and previous versions, this worked. (I haven't tested 1.46.) Trunk and release are hosed, leading me to suspect that this random number generator is no longer producing sufficiently random data. I have verified this by replacing boost/random on trunk with the one from 1.45. With this change, the accumulators tests pass. Steven, this seems like a regression. Can you look into this? -- Eric Niebler BoostPro Computing http://www.boostpro.com