Qam looked into it today, and apparently the way Xenforo is set up -- changing it would require a workaround in multiple places, and any time we change stuff in the future we'll have to remember to account for the workaround. I'm not willing to commit future work for this. If the workaround were...
We received an anonymous suggestion box comment today asking about switching the logo to link back to the forum instead of the home page. After talking with Qam, she will look into this later on in the week when she has time. It may or may not be possible. There are also implications for SEO...