For the last 18 months, Saudis in the eastern Qatif region have been demonstrating regularly, demanding the release of all political prisoners, freedom of expression, and an end to ethnic and religious discrimination. When Saudi security forces turned on the demonstrators last November, killing five, the protests took on a distinctly anti-Saud tone.
In June, King Abdullah ordered the country's security forces to go on a state of high alert due to what he called a "turbulent situation" in the eastern region.
The unspoken side to the situation is that the turbulence is distinctly religious.
Most Saudis are Sunni Muslims, and Sunni Islam is the only allowed religion in the country. However, 15% of the country's inhabitants are Shia, and they have faced direct and indirect persecution for decades.
Guess where the Shia live? In those turbulent, oil-rich eastern provinces.
That is one aspect of Saudi discontent. But there are more.
For example, last week Saudi security forces raided al Qaida cells in Jeddah and Riyadh. Evidence recovered during the raids supports the suspicion that a new branch in the Arabian Peninsula is gathering momentum for a wave of attacks. The royal family is at the top of their list of targets. Toppling the House of Saud would be a major victory for al Qaida, simply because of the instability that would ensue.