Django gotcha: initial_data.json is loaded on every syncdb, so you shouldn't use it for data that you'd edit later.
miniblog.
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Rust gotcha I haven't seen before: you can't move out of a vec by index, even if you own the vec.
This is because it'd leave the vec in a bad state: you need .remove() or .pop() instead.
Delighted to hear that Python 3.2+ has fixed a nasty gotcha with stale .pyc files: http://t.co/ZFOojps86y