Permissions not saving I'm working on a development site. Up until recently I haven't had any trouble with saving permissions, everything was working fine, until I added the different user roles for the site. After I added them all, I went back, and started to assign the correct permissions to the correct users types. I hit save, and... nothing. 

No error message, no message at all. And the save didn't take effect. I'm starting my head over why it suddenly just isn't working when it was working before. Is there a limit the the amount of users types that Drupal allows?
This sounds a lot like a php runtime issue. PHP has a configuration called max_input_vars, which you can use to set a limit on the number of input vars php will accept. This will affect the number of $_POST and $_GET variables that can be fed into php. The default is 1000, and I suspect, if you have lots and lots of user type, you're hitting up against this ceiling.