OK, this thing has the potential of becoming a rather big news especially when the popular media picks it up or the a coverage in Nature (whichever comes first). This arXiv preprint titled "A Case Study of Gender Bias at the Postdoctoral Level in Physics, and its Resulting Impact on the Academic Career Advancement of Females" is getting quite a bit of legs. You might want to also look at the trackback links to read more about it.
I'm not endorsing or disputing the report, simply pointing it out since the cat, obviously, is out of the bag. I'm guessing there's more to come on this.