This is certainly true. I searched google images yesterday for freerepublic.com and paulycy and the only image (of many) that I posted that showed up was an old image talking about global warming. Not one other image showed up.
It seems to me that there would either be a lot or none. This selective filtering is at least suspicious in my mind.
One of the ones that seemed to disappear was the comical photo released of Obama flexing recently sculpted pecs. They seem to have been removing and cleansing the image archive of .gifs and .jpgs that portray Obama negatively, including certain cartoons and caricatures. That does not seem to be the case with Bush, for instance. Or even McCain.
If there is a double standard that calls into question the search engine’s claim to being a source of online information. Obviously, a political site itself, censoring non-liberal content and thereby distorting the news and reality. Like the Orwellian removal of words from a dictionary.