Dear all, After moving from boost 1.34.1 to 1.35.0 I have noticed that the sequence of values returned by the minstd_rand generator has changed. The following code snippet generates different values with 1.35.0 than it did with 1.34.x and 1.33.x: //------------------------- typedef boost::minstd_rand rng_type; typedef boost::uniform_int<> distrib_type; typedef boost::variate_generator<rng_type &,distrib_type> source_type; rng_type generator(42u); unsigned int seeds[] = {12,23,42}; distrib_type dist(0,INT_MAX); source_type randomSource(generator,dist); for(unsigned int i=0;i<3;++i){ generator.seed(seeds[i]); std::cerr << seeds[i]; for(unsigned int j=0;j<5;++j){ unsigned int bit = randomSource(); std::cerr<<" "<<bit%1024; } std::cerr<<std::endl; } //------------------------- Output with v1.35.0: 12 691 854 1010 690 696 23 444 337 394 1000 751 42 404 8 37 977 972 and with v1.34.1: 12 691 844 854 975 292 23 214 852 444 337 394 42 883 404 943 348 8 If I use the mt19937 generator instead of minstd_rand, the sequences are the same across versions. In the event it matters, I'm using g++ v4.1.3 on an Ubuntu Linux system. Is this user error, the result of a bug fix in Boost.Random, a new bug in Boost.Random, or is my expectation that the output of the RNG should not change across releases unreasonable? Thanks in advance for any help. Best Regards, -greg