After nine months and several requests, many of you will be happy to know that I finally got around to updating the random number generator to allow negative values in ranges when using a normally-distributed random generator.
You can head over to the Random Number Generators page to download the latest source and binaries. (For those of you who don’t know, I’ve published source and binaries for generating random numbers in a normal distribution.)
Thanks to everybody who complained — if this library was not useful, I would never have gotten around to fixing it!