Some projects teams throw a small office party for major releases - so why not for 1000th commit? 1000th commit is a good marker, usually project has progressed quite nicely by that time.
Do you celebrate or give any extra attention to such 'magic number' commits?
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I wrote a simple pixel tracking program that works something like this
Step 1) tracker.com sets a cookie
Step 2) mysite.com displays <img src="tracker.com/tracking.php">. That image reads the cookie from Step 1 & does some processing.
Works great in Chrome, Firefox and Safari. But when tested in IE, the cookie can't be read in Step ...