[SOLVED] image not showing in post on the main page ????

hey i've searched the forum and can't get a hold of the information i need surrounding
the image not showing in my posts it only shows when i click on the post
but on the main page it isn't showing

when i;m swithching of themes to the older ata 3.4.9 it does show
but when i switch back to 3.5.1 it isn't there only when i click on it to read the post

could someone help me with this or give me explanation on how to handle the situation

thnks in advance