Quickbooks this is totally unacceptable, im very disappointed with the amount of your customers that have this issue and the issues is still the same, you just keep pulling the wool over are eyes with the same thing " contact customer support " 

i too keep getting this constant issues with customers unable to open invoices, and it just not good enough, may be i should hold back the quickbooks payment and see how they like it

i have now closed my account with Quickbooks and looking at using Sage ( UK company ) or FreeAgent

Goodbye and thank you for the lack of support 

Matthew