Holy s*** again! Of course, it's my tar noobines again. The file inside .lzma archive isn't corrupted, it's just .tar with wrong name. So, after un-lzma'ing, just untar it (plain tar, without compression), and you should get final, working .ext3 file.

I'm going to fix that in uploaded file anyway, but - people that already downloaded it, and haven't deleted yet - I've confirmed that it's 100% working after un-lzma'ing *and* un-tar'ing after.

/Estel