Hey, am new to this and just getting used to it, am fine moving around etc but am having problems when I click on certain things, like:

the magnifying glass for pics on walls,
viewing ppl's profiles after I've right clicked them
when I press any of the buttons along the bottom on screen.....

....basically after any of those I am unable to move or do anything - it hasn't completely crashed because other ppl still move and my avatar still moves on the spot but I just can't go anyway or click anything else after that and I have to close the window and log in all over a again.

Apart from this I believe everything else works completely fine, any suggestions?

Thanks