Products with attributes => Price bug

[ni_ch]

Hello all,
I have following problem and can't to solve it, please help me.

Input data:
- I use several currencies in a shop
- product prices are putted in default currency in back-office
- default currency is not a currency of shop's country, so users are choosing lockal currency in front-office and use prices reculculated to lokal currency
- Products usually have several attributes like size and color.

So, if I add a new product to catalog, and this product has not attributes, then everything is Ok.
But when I add attributes combinations to product (even if only one combination), then I have following situation in front-office:
- Choosing lokal currency,
- Choosing some product category, or just looking to Home category on a front page, and there we can see correct product prices in lokal currency,
- Clicking "Viewe more", and then, on a product page we can see product price which is putted for default currency, not for lokal one, but with lokal currency's symbol. If we try to choose another currency, then price (numbers) will stay the same, and only currency's symbol is changing accoring to currency choosed...

I have tryed to put prices differently for each combination, but result is the same.