querying posts by custom taxonomy terms right from a querystring based URL

This should work :

  yoursite.com/taxonomyname/bread1,bread2

So for example, on my site, I actually use :

 mysite.com/location/barcelona,paris

And I get a list of all posts tagged with Barcelona or Paris

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)