I use only pp_standard. And all orders are forwarded to paypal in yens (currency is hardcoded), currency selection used only to show price in selected currency.
The problem is that if you select RUB from list, Payment Method is empty, select any other currency and paypal payment appears. And seems this happened after i upgraded to 126.96.36.199, since there are some orders that were paid while RUB was selected. Now i've tried to upgrade to 188.8.131.52 on localhost, still same problem. Live shop still 184.108.40.206 since i need to update my template for new version.
I have no idea, why this is happening and now have only one option and it's removing RUB from list