[Plugin: Seamless Donations by Designgeneers!] Error when $ is used with "other"

Using a dollar sign in the “other” donation box generates this error after submission: “Error Detected
Error Message

The link you have used to enter the PayPal system contains an incorrectly formatted item amount.”

Will you be adding in javascript validation for this error. I know I can add it myself, but it seems less than optimal to do it that way for the future. Thank you again!

http://prcforlife.org/get-involved/donations/

http://wordpress.org/extend/plugins/seamless-donations/