Checked again today the "Caution Slippery" signs are definitely new. It's not exaclty a panacea but as a relatively inexpensive fix it might bring a few people to approach that turn more judiciously.
On a personal level, given my pathetic track record at prodding state and local government to take action, I view this as a victory of sorts.
As to the Italian Store, when is that place ever not mobbed? I tried to go there once with my 3 year old daughter (hence my Elmo tag, yes I live in Elmo's World unfortunately) for lunch on a weekend and promptly gave up.