For about a month now, the Market hasn't been updating my apps very well. Since it's having these problems, there will be at least 20 updates to do, and only maybe 1 or 2 will be successful. The rest say "Update Unsuccessful" in my status bar, and when I click on them, it says "Unknown Reason - 18." I have seen the advice about clearing the data on the Market app and the Download Manager. Tried that. It will be able to successfully update maybe 4 apps after that, but the next time I try to update apps, it goes back to the old unsuccessful rate. I've tried pushing "Update all," and I've tried updating them individually in case having so many updates was overwhelming the app... I don't know what to do. Nothing seems to help. Any suggestions?