As far as being hijacked, normally that means you have a google redirect malware bug on your computer, I have done several security scans with the software I run on my servers on the new iboats forums and not catching anything. Now I am starting to see the same complaints over and over again, I am sure they are well aware of every single error that is occurring, they have logs that point out where errors are happening and what is causing it, it is easy to know you have a problem, but with so many types of servers these days, it is difficult to figure out what needs to be changed to make it work right, I am working on the same situation on one of my brand new servers, set everything up by the book and still have things I have to customize to make it work correctly, when you are dealing with 1/2 million members and well over a million messages, it is not easy. As far as upgrading, often times it is required to protect the membership from the hackers, who are always working on how to crack databases and break into websites.
It just takes time guys when dealing with stuff this large and complicated, I don't get frustrated, I simply have patience and know it will get fixed and working 100% again.