Problems with Mars rovers is not limited to the new world. ESA's ExoMars mission is having it's own problems:
"The ExoMars rover, which will search for signs of life on the Red Planet, will not now launch until 2016 because of the high cost of the project. The 1.2bn-euro price tag is deemed to be too high by governments, and space officials have been asked to find ways to reduce it." Full article at http://news.bbc.co.uk/1/hi/sci/tech/7677349.stm and some nice commentary at http://cumbriansky.wordpress.com/.