Most black bezeled UPO's have that exact same pearl. I've noticed the orange bezel versions are much better in that regard.
Pearl is off you should change it for an aftermarket insert with a correct one ...
You'll find one on Ebay seller : wholesaleoutlet990
price about : 22 Euros
then it should look like this one ..
here is the link
http://cgi.ebay.fr/BEZEL-INSERT-FOR...260?pt=LH_DefaultDomain_0&hash=item483f9c3984
but ask the seller a good insert with a center pearl and send him the picts as he have some different model.
Then it is very easy to change the insert ... with a sharp knife after heaten the insert with a hair dryer ...