UI Components Display issue

Hi friends,

I am facing an unusual issue from past 1 week. While using UI components to view, suddenly the UI components become invisible, like button and tabs becomes invisible but the button and tab caption can be seen, the textfield, combo box and date fields vanishes but the values will be visible, all such problems occur when using UI. When i refresh the page the UI components are again visible but after sometime the issue arises again. I am using Reindeer theme for my application. I wanted to know if anybody are facing the same problem or is it Reindeer theme problem or is it a memory issue or any other issues which might be causing this problem.