Yes, indeed it's horrible for people who try to learn polish... A quite famous german, Steffen Moeller who has been living in Poland for 8 years by now, said as he once came across a monument od Adam Mickiewicz, and there was written "Adamowi Mickiewiczowi Rodacy" (or sth like that <img src="/images/graemlins/wink.gif" alt="" /> ) And he was thinking if it's a realtive of Adam Mickiewicz, since they had quite similar names <img src="/images/graemlins/smile.gif" alt="" />
But don't worry about being perfect with the cases, we have a cooking show of an half-french man Pascal Brodnicki in our TV and he's constantly making mistakes in the cases <img src="/images/graemlins/smile.gif" alt="" />
And to cheer you up fully, in one week I have an exam in a class called Kultura Języka Polskiego (Polish Language Culture) and it's all about the cases, making the names of citizens from the town names, the adjectives out of them... And I must say... It's soooooooooo difficult! After each class I have a feeling I don't know my mother tongue at all <img src="/images/graemlins/wink.gif" alt="" />