This enhancement has been incorporated in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:
This problem is due to some of the internal parameters used in the MATLAB random number generator. It is a shortcoming of the design of the algorithm, not a bug in the code. (As a note of interest, similar shortcomings are not uncommon in all pseudo-random number generators).
To work around this issue, you can download a different random number generator from the MATLAB Central File Exchange. It is called the Mersenne Twister, and is a relatively recent uniform random number generator algorithm. This is available at the following URL: