Hi, I have a strange problem. I ran my DaisyDisk yesterday and it told me I have 4 more GB left on my Air. Today some strange things happened when I accidently let the battery run emty and then plugged Air in and turned it on. Some applications (including Byword and Fantastical) gave me message "application is damaged... download it again from App Store", Dropbox didn't want to run saying it can't establish a secure connection and spotlight was analyzing my computer for minutes. When it finished, apps were working again, but the disk is now emptier. DaisyDisk informs me I have 7 GB space left. I am kind of worried that some data corruption happened in this scary process, though right now I can't confirm it yet beside this misterious lack of 3 GB. What do you suggest, dear MacRumors people? Thank you in advance.