One of my site www.tkquiz.com which is basically a quiz site. People come here and participate in quiz program set everyday. 4 questions set every day. The problem I'm facing that some of my users getting 3 questions instead of 4. Most of the time the first question gets missing. In other occasions the last question gets missing. Firefox is causing problem most of the time. With same browser my user would get 4 questions today and 3 questions on the other day. Some never face any problem and some face the problem on regular basis. I want to know from you guys what could be the reason of occasional bug. I mean that doesn't occur every day? Any clue?
you will need to identify on what kind of browsers versions you have problems, and then start testing or you can add a message on your page "please update your browser to the right version(and write the good version)
I do have message not to use firefox, but I want to get rid of the problem for good. Many people do not notice the message.
Without knowing how the code functions it is difficult to guess the cause of the problem. Given you are saying it is browser specific it would appear to be linked to a response the browser sends which could suggest you may want to look at both your javascript and cookies related coding.