I'm getting a lot of unhandled exception errors when trying to save stuff in my admin. It's totally random in some places, sometimes it works, sometimes it doesn't. Where it seems to consistently not work is in the appearance section... whenever I try to modify a setting or change my header html it throws an exception.
Can somebody enlighten me as to why these exceptions are occuring? I'm not that familiar with this! How can I find out the cause and resolution?