I find it striking that most people in the Western world seem to be unsympathetic to the most recent Tibetan protests, especially the Free-Tibet faction, who seems to have gotten a lot quieter. A few reasons for this are:
1. Weakening economy at home: many people just don't care about other people's plights when they have many problems of their own closer to home.
2. War in Iraq and Afghanistan, with many cited civilian deaths and human rights abuse: Westerners seem to be more concerned about their country's human rights issues to worry and accuse others of human rights abuse.
3. Pictures of Tibetan protests and police arrests in the United States, Europe, India and Nepal: Pictures of Tibetans being arrested and wrestling with police in other countries overshadow the pictures taken of Chinese police holding shields and batons.
4. Dalai Lama is in India: The Dalai Lama has not been in Tibet for almost 50 years, and much has changed in Tibet since then, so he has no power in telling the people what to do.
5. Most pictures depict the Tibetans as an unruly mob beating innocent bystanders, burning people and belongings, and ransacking stores: This is going to hurt the Tibetan image as a peaceful group who hold non-violent protests against a so-called "violent" Communist regime. I think what happened in Tibet really backfired when things turned violent for the Tibetans. The Communist Party probably wanted things to get a little out of hand before moving in and dealing harshly with the mob. This way, the early stories just show violence being commited by Tibetans against the Han and other Chinese minorities.
6. Completion of the Qinghai-Tibetan railway: Most recent travelers to Tibet who took pictures probably used this railway and found the Chinese hospitality and the modernization or living standards in Lhasa quite good. Many recent pictures from Tibet also show a nice city with green lawns, many restaurants and shops.
7. Perception of China as a rapidly develping country with growing influence: People's perception of China has changed and many in the West are actually quite optimistic about the country, where people are living better and the cities are growing at rates much envied by other developing countries. Also, people are excited about China's first time hosting the Olympics, and wish it success, as the Olympics is a symbolic ceremony of the peaceful gathering of countries that trancends politics and past grievances in giving praise to human culture and the human will to overcome difficulties.
8. Ease of information on issues and events through the internet: People's cultural understanding has expanded greatly thanks to the internet and websites like Wikipedia, where information is shared and presented from all sides to get a fairly balanced view. It's not like before where one group can have a huge sway over the public because access to information is more limited and harder to get, especially during the 60s and 70s when Dalai Lama was popular with the West and China was viewed as isolated.