empty .sql.gz dump files

Hello,

While trying to get externallinks.sql.gz for enwiki, I found that the
file was empty. Looking at the hashes, I guess several of these metadata
dumps have failed (but marked as successful, of course):

http://download.wikimedia.org/enwiki/20100130/enwiki-20100130-md5sums.txt

e32d799e86f8d2be5ebb3eed048238c7 is the md5 for these 20-byte files.

Older stuff seems ok (enwiki-20100116-externallinks.sql.gz) - as does
data for other wikis (enwikibooks-20100206-externallinks.sql.gz).

-Mike