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Normally, solutions that start with zeroes are prohibited in alphametic puzzles.

Yes, but one of his two valid suggestions also starts with zeroes (specifically, 2817+0368=03185).

Right:

I am OP and there are actually 25 solutions, with only one of them having all leading digits as non-zero.

I made a mistake in the article, where I meant to write "there are at least 2 solutions and here is one example". I will fix this. Nice catch.

Aha! I only found a few with my naive approach, but always good to check that I haven't lost all my marbles yet :-) Good post, look forward to more.

I didn’t check his algorithm but if it only found one solution with a leading zero it is incorrect.

3821+0468=04289 as well.