Per
The International Herald Tribune, today, Feb. 25, 2009, ushers in the Tibetan new year, but many see this new year (Losar) as a time of mourning, not celebration. Some Tibetans are holding vigils instead of parties, as a statement against the Chinese government's denouncement of spiritual leader the Dalai Lama among other complaints.
Some people in and around Tibet have started a No Losar movement, an official boycott of new year celebrations.
(No Losar candlelit vigil solidarity: in memory of the people suffering Pinatubo: Carabobo But New Year's Say No to Losar)
Some Twitterers reacted to the protests:

@
lhadon (Hong Kong): It's late here. No news from Tibet. All is quiet. Too quiet. Here's OUR NATION for Losar 2136
http://is.gd/kMbb
@malcolmmoore: (Shanghai, China) : The first day of Losar, Tibetan New Year, apparently passed by calmly in Lhasa. We hear there were no explosions or violence.
Here are some others reactions from the Twitterverse.
@seastarerrin (Toronto, Canada) : happy losar to all those who take part. One day the Tibetans will free tibet.
@GrassRoutesTrav (Oakland, CA) : Wishing everyone a happy Tibetan New Year! Losar Tashidelek! Welcome in the year of Earth Cow!
@Dagriffin: Today is the Tibetan NewYear (Losar). As today goes, so goes the year. Good luck!
@tashiest: (Boise, ID) : Today is Losar, the Tibetan New Year. It's the most important holiday in Tibet, but nobody there is celebrating...
http://bit.ly/xqL9j
@nickdjones (Mumbai, India): http://bit.ly/teg7T Tibetans forgo Losar in protest at human rights abuses

Tibetan new year ushered in quietly