Few weeks ago I bought CaseMate Barely There just to check how my 9810 will look like in black.
And after proper aplication I discovered, that it loosened the slider.
Before I got really tight slide, new 9810, nothing was loose.
And after I put on the CaseMate the screen part when closed is now 0,2-0,5mm above keyboard part and there's a weird "clicking" feeling when you operate closed Torch - when the parts separated come together after applying pressure.
I know that after a while my 9810 would become loose - that's a matter of time. But one should not sell accessories that can damage the phone...