Mouse hovering problem on Lion

Hello everyone,

my problem is that with no reason mouse hovering in Lion is not responding. For example, when I hover my mouse on the dock it does not magnify, it is like there is no pointer at all. In addition, another instance of this is when I am on a webpage, and the mouse hovers over a link where it would normally change to a gloved pointer hand to indicate that it was hovering over the link, it does not; the pointer stays the same black-on-white shape. Moreover, when I hover the mouse over the red button to close the window in the top left-hand corner of the window, the X does not appear on the red button, the - does not on the yellow, and the + does not on the green. Finally, when I open a menu where there is a submenu in a software like Photoshop, neither it highlights nor it shows the submenu until I click on it. It does not happen always and a restart resolves the problem but it is annoying. I am using a Logitech MX600 Laser Cordeless mouse (Unfortunately the magic mouse lags terribly cause the bluetooth signal is not strong enough). I have all the latest updates and I am using an 8 Core Mac Pro (early 2009).

In this video, you will see exactly what I mean:

http://youtu.be/qD_nlMhQUvs