A few notes. Furring is preferred, but the OED accepts the variant firring (these strips are often made of fir).
Hateful phrases like "Drive decent." I can't resist saying "ly," which produces a blank stare. In the USA, alleged now is dominantly two-syllable; the-ed syllable is disappearing (Webster's Collegiate now places that pronounciation second. The same is happening to other -ed words, but I have difficulty in pronouncing learned without the second syllable.
Kit Kat, a person lies on the bed but what about a dead body? Noreen, there are millions of stars, not a million stars (Your example is one that gives immigrants trouble).
Gee, all (of) these folks jiving each other about grammar, chomping at the bit to add their pet peeves (chomping at the bit is at least 150 years old, why go back to the English champing unless you are English?
To the guillotine with all who say co-vert rather than cov-ert! In a few short years, the correct cov-ert has all but disappeared, even the dictionaries have given it first place. But after all, it is usage that eventually determines what forms are correct.