In the menu bar, click Tools, Options, Content, and make sure that the Load images automatically box is checked. If that doesn't fix it, you may have an add-on which is blocking them.
hello. please mark this thread as answered. you do not need to uninstall/install adblockplus. simply go into the adblockplus in tools then select the filter you need to remove by highlighting the filter rule then go to filters, remove all filters. you can then go back and add the master list again. depending what country you reside, i only us Easylist USA.