I have tried several different mirrors and still getting that error message, but gives me the OK install after the error message on the bottom of the Apps Browser. I even search for flash11 in the OnBoot Maintenance and can't find it. Is it working for anybody else? Okay, so i finally got that repo mirror you mentioned in your post above working, but it doesn't even get to download anything and just gives me a failed.
Update: Now i have noticed that it does start downloading the dep. (nss.tcz, nspr.tcz, and squashfs-tools-4.x.tcz) but right when it tries to download flash it just gives me a failed message. I'm not sure what exactly is happening in that small box because it disappears so fast. This is using the repo mirror by the way.