Resolve platform dependancies with current random number generation. Many registration algorithms depend on random sampling, exactly where I came across the problem.
It would be great to standardize the random number generator to be sufficiently random, fast and generate the same sequences (from a given seed) across platforms. The discussion culminated with a post: http://www.itk.org/mailman/private/insight-developers/2005-January/006220.html I'm not sure any action happened on the suggestions.
More information on mailing list under "random number generator".
It may be worth following the thread http://www.itk.org/mailman/private/insight-developers/2005-January/006189.html A stable portable may also be obtained from http://www-personal.engin.umich.edu/~wagnerr/MersenneTwister.html