I can't download Flash Player. It gets to 50% and then says "Download error". I've tried uninstalling it and re-installing it, but it only made things worse. I can't re-install it, so I don't have it anymore. It gets to 4% then says there's an error.
I've tried doing what the troubleshooting page says but it hasn't helped at all.
I have a Mac OS X 10.8, I'm using Safari version 6.
Is the error message "General Installation Error"?
Yes it is
Okay, it's not a Flash Player problem. That's the good(?) news.
The bad news is what the problem is really caused by.
See: http://forums.adobe.com/thread/1318151 for instructions to fix this IF you have a time machine set up and it has backups prior to the 10.8.5 update.