But in testing numerous Windows 8 computers, I haven't found it to be unstable or buggy, at least in new machines.

WSJ: Mossberg's Mailbox: When an iPad Isn't Enough

Such land is unstable and can be dangerous if foundations aren't properly built, said Mr. Mannan of the building-safety agency.

WSJ: Local Officials Punished Over Building Collapse In Bangladesh

All these partner particles are unstable except for the lightest one, which can't decay into anything else.

CNN: How particle smasher and telescopes relate

And a local entrepreneur says he doesn't like doing business elsewhere because areas outside Kurdish control are too unstable.

NPR: 10 Years After US Invasion, Kurds Look To The West

"In theory, you'd like to have more electrodes, but not if it means an implant that doesn't survive more than a few months" because the device is too bulky and unstable to stay in place in the eye, Dr. Greenberg said.

WSJ: The Quest to Create A Bionic Eye Gets Clearer

The broader European financial crisis and unstable employment situation means that the usual European vacation-home buyers aren't buying.

WSJ: In Spain, a Property Bargain-Hunter's Dream