Here you go, according to the website of the International Campaign for Tibet no less, one of the Free Tibet groups though not the only one.
http://www.savetibet.org/news/newsitem.php?id=1275
And I quote
“In recent weeks images showing soldiers in Tibet carrying monks’ robes have been distributed widely across the internet, with some commentators claiming they provide evidence that Chinese soldiers disguised themselves as Buddhist monks during unrest in Lhasa last month. ICT does not regard the images as credible evidence of this claim. Similar images, of soldiers carrying monks’ robes in the Jokhang, are in ICT’s possession, taken during a film shoot in Lhasa which involved soldiers appearing as monks. These current images are likely to be the same - in recent years soldiers have been hired to play monks in both Chinese propaganda movies and in mainstream foreign films - for instance, Michelle Yeoh’s ‘The Touch’, shot in Lhasa in 2001.”
The problem is that it is pretty evident that this photograph has been mis-represented, repeatedly. Despite it being not what it purports to be, some people of dubious intellectual honesty keep repeating it nonetheless.
Especially interesting to me, is that Asher (while claiming to be a Buddhist) also seems to be a gratuitous defamer against Gordon Thomas as a "racist bigot" and other inflammatory derogation more consistent with marxist rhetorical attacks.
Based on your linked story, the picture apparently surfaced only in March of this year, according to the ICT itself....and now they are alleged to be of dated origin.