Post getting in loading mode

Hi,
i am designing a blog and there i m using the TEMPO theme and collapse-O-Matic plugin. Now i am having a weird random problem there- sometimes if i click on a post(anywhere on the post) , it gets into loading mode and post grays out. It also sometimes happens when i click on the collapse link. But sometimes it works completely fine- collapse works totally fine and clicking on the post does not go into loading mode. This problem is driving me crazy..anybody has any idea please?