I have ubuntu 11.10 on my usb flash maxell (4 gb) i installed it with universal usb installer and in the beginning everything worked just fine. I installed a few apps (skype, audations, vlc, codecs and a web camera app) it continued to works. but since yesterday it doesn't boot it shows me the operating system loading screen (ubuntu with the dots turning orange and white) and nothing more... please if anyone can help?