AR Receipt - Special / invalid characters in AR check / receipt field causing Bank Reconciliation issue

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A user entered a '[' within text in the AR Receipt Check/Receipt No. field which then caused an issue in the Bank Reconciliation. We are on version 2014 (300 Premium ERP) (Build 1) (Product Update 1).
A posting by Connie H. in Sage Ideas database titled "AR check / receipt field should not allow special characters" indicates there is a hot fix to correct this. Can anyone confirm this?
Any thoughts on whether reversing the AR Receipt Entry and redoing would fix the fault?