We recently added a new person to the team and he is using an imac with firefox and safari and he cannot attach any files to fogbugz cases. every time he tries to attach a file to a case he gets this error "Warning: file not found". We tried to verify the browser configuration and also disabling all the browser's security checks, we tried this with several files and it never works regardless of the size of or the position of the file.
Any suggestion ?