I spotted this thread linked over from the Kaggle competition and as a big fan of FastAI (recently spent many nights working through Part 2!) I thought I’d share my notebook which I got working. I didn’t actually hit the problems mentioned above, but hopefully someone will be able to see what I’ve done differently: https://github.com/jamesr2323/deep_learning/blob/master/experiments/whales_baseline.ipynb
Also before posting the notebook I updated FastAI to the latest commit on Github and hit an issue initialising the test set, which I’ve submitted a PR for https://github.com/fastai/fastai/pull/515 .If you have the same issue you can use that change as a temporary work-around.