Google Duplicate title tags strange problem ?

hi

i am at google webmaster tools

and i look at HTML suggestions Duplicate title tags

and what is very strange for me is:

/category/simple-title/
/category/simple-title

i use WordPress blog platform

and what is going on , how to fix that and why ?

 

its means u have two pages with one title try to make different titles for different pages .......

 

u need to change otherwise u r in google supplement result.

 

Hmm ... still don't get it :
/2008/10/08/aruzo-dark-blue/
/2008/10/08/aruzo-dark-blue

this is one page but google show this as page and page/ ??