This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Because somebody thought hashtable is all one word? Because somebody misunderstood the convention about subsequent words having capital letters? I think there probably is no deep mysterious reason for it.