Why aren't some photos with tweets viewable?

I haven't been able to view some tweet-pics on some of the people I follow on twitter. I have checked my setting and still no luck. Can someone explain what may be causing this?

 

Sometimes when stuff happens to me like that I'm told by professionals to update my browser or clear my cache. Sometimes it works and sometimes not.

 

Thanks for the info.. I had someone else associated with the person I'm following check it out. They had the same effect as myself. Not sure if that is what it is, but I will double check this. Thanks.

 

Your welcome, hope that's the issue.

 

That can be a security or privacy issue. Probably someone has blocked you to see the pictures.

 

Try doing that in another browser. Maybe it's browser fault

 

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The user who are following you might be set a security for pic.

 

I guess clearing your cache and clearing it from your browser may solve this issue if not then they may have a high resolution photo , try to visit their profile and click on their pictures if it doesnt solve your problem then maybe they have set up some security feuture as someone has said earlier in this discussion.