I had a bunch of test files in a directory that I had indexed earlier.  I
wanted to blow away all the files and start clean.  So I removed all the
files and re-indexed, but when I did a search, I still saw all the old files
there.  So I ended up having to delete all the index files themselves and
then re-index.

Is this normal behavior (i.e. that a re-indexing of a freshly emptied
directory will not purge the old index contents)?

Thanks,
-Steve