Hello
I have installed Confluence 5.1 standalone on an Amazon ec2 ubuntu image. Confluence works perfectly, but when I try to install upm or gliffy plugin via marketplace or manually, I receive an "unexpected error" message. I use mysql and first I increased the 'max allowed packet size' to 32M, and then to the maximum, but I still receive the error. I don't know if there is something I have to consider with Amazon ec2, but I hope this is an known error for you and you have experience with confluence on Amazon ec2. I would appreciate very much if you can help me as I would start using confluence as soon as possible.
Thank you,
Slaven Imhof