A story from developing in the internet:
I am developing  a booking system right now , so I am extending madata mechanism of madpy to handle date inputs. So I am in need of a calendar. After searching a bit I ended up witn nogray calendar .  I must have downloaded and started embedding it in madpy on 29th of January.I discoverred some bugs concerning previous and next month navigation and date limits and started fixing them. Then on saturday 31st I am visiting again and I am reading this announcement that the bugs were discoverred and corrected too:
"""
On Jan 29th 2009 we've fixed a bug related to the next and previous months. The following files were changed (drop in replacement for the old files)

• nogray_calendar_vs1.js
• nogray_calendar_vs1_min.js
• nogray_date_calendar_vs1_min.js
  

""""

 It seems that we were correcting the same bugs at the same time . Anyway I downloaded the new version istalled it and then found one more bug which I reported (along with solution) and now I am mentioned here.
Cheers Wesam.