I detected a bug in the select/search window.
When in the Opportunity module, for example, and we need to select an account, it opens a Search windows. This window, doesn’t update correctly when we scroll down that page and sometimes we can’t even select an account (or other entity) because of this error.
This happens in all the Search window.
(Sorry for my bad english 
)
If someone knows how to solve this problem, please reply.
Thank you