Andrea Pelloni pointed out that Ax.0 data isn't drawn if your area
crosses a 7.5-degree declination zone. This took me a while to figure
out, because the cause is _really_ strange: the path to the data must
end with a '\'. For examples:

A2_PATH=14.3;f:\
A2_PATH=14.3;f:\a20\
A2_PATH=14.3;f:\a20\;g:\more_a20\

I've fixed this, and the fix will appear in the next update. But
in the meantime, just don't forget the '\'.

As Mark pointed out, you can get Tycho-2 in twenty compressed 'chunks'
of about 8 MBytes each, resulting in a download of 160 MBytes instead of
500+ MBytes. This does leave the problem of joining the twenty decompressed
chunks back up into one file.

-- Bill