I've used your PlugIn on my site, http://www.icon-hairdressing.com and I love it!
When I try and buy using a Mac via Firefox, Chrome or Safari all seems fine. However I've a customer emailing saying she's getting:
"the link you have used to enter the PayPal system contains an incorrectly formatted item amount"
The page she's on contains the following code:
250 ml @ £16.55
1 litre @£39.99
Has any one else had this?