Sometimes Aren't the Errors More Likely?

Are there ever times that mistakes in English seem more likely the the actual correct phrase? I saw this sign advertising an apartment for rent with furniture...

After all, isn't it more likely that an apartment with furniture is furnitured than furnished? And isn't it great that the owners of said apartment went to all the trouble to get the sign actually made with the wrong word? I personally vote to add this one to the dictionary... furnitured indeed!

Happy Errors!