I tried with some lists, including one containing almost 400 sentences, and it worked properly.

In the meanwhile, I have a few suggestions:

1) I'd like to see the ID of sentences. For example: I download some lists for whatever reason, and, if I notice any mistake in a sentence and I want to report the mistake on Tatoeba, I would personally find it quicker to copy and paste the ID rather than the sentence.

2) I would find a delete button useful. If I download something and then I notice it isn't the thing I wanted to actually download, I'd like to have the opportunity to delete it, since this would avoid any confusion to the user if he/she has the need to download many things, and, not less important, doing this would free some space on the server.

3) What about mentioning the license of the sentences contained in lists? Maybe this would be helpful if someone wants to reuse them.

I tried downloading some lists containing more than 1,000 sentences and it worked fine. The only drawback is that exported lists are monolingual.

That 100-sentence limitation was a problem. Thanks for working on it.

I just saw that the download button is truncated when the list name is long: http://i63.tinypic.com/15s3cih.png