Using SSRS in integrated mode, Reports can be viewed in IE but not in Firefox, Chrome, Safari, etc. They get "An unexpected error occurred while connecting to the report server. Verify that the report server is available and configured for SharePoint integrated mode." (Oh, and it also happens to one IE user on the domain as well)
It might be a double hop issue, since we do have a dual farm (frontend and report server). I've been following directions pertaining to double hop authentication, and I'm currently using setspn, all to no avail. I cannot find anyone else with this problem. This is really frustrating.