Fix issue #1 by changing variable name and converting currency to lowercase before checking

public_html/modules/donate.php

@@ -67,7 +67,7 @@ if(!empty($_POST['submit']))
 		switch($sPaymentMethod->sType)
 		{
 			case PaymentMethod::PAYPAL:
-				if($sPaymentRequest->sCurrency == "btc")
+				if(strtolower($_POST['currency']) == "btc")
 				{
 					$sCurrency = urlencode("USD");
 					$sAmount = round(Currency::Convert("usd", "btc", $_POST['amount']), 2);

public_html/modules/payment/paypal.php

@@ -22,7 +22,7 @@ catch (NotFoundException $e)
 	throw new RouterException("No such payment method found.");
 }
 
-if($sPaymentRequest->sCurrency == "btc")
+if(strtolower($sPaymentRequest->sCurrency) == "btc")
 {
 	$sCurrency = urlencode("USD");
 	$sAmount = round(Currency::Convert("usd", "btc", $sPaymentRequest->sAmount), 2);