Original author of the Biopython implementation here. Out of the maybe 100,000 lines of code that I have out on the internet somewhere, I never would have thought that this little module would be what makes the front page of Hacker News! Unfortunately, it's for a bug, but hey, I guess you can't win em all.
I've submitted the fix back to Biopython. Thanks for reporting the problem, and please let me know if there are more issues.
I've submitted the fix back to Biopython. Thanks for reporting the problem, and please let me know if there are more issues.