Three .html-only hits from same IP+UA in two weeks. Each time in a post-Twitter swarm:
85.114.136.24*
Mozilla/5.0 (compatible; Windows NT 6.0) Gecko/20090624 Firefox/3.5 NjuiceBot
robots.txt? NO
A one-time-only referer was a tinyurl link to the exact same file.
ISP is in Germany: Gameserver. Beats me.