I'm glad to hear I'm not the only one! We also (myself and my partner) missed out on the Solidarity Tax Credit last year because same as this year, it wouldn't print.
Last year, we manually printed out the form and included it, but Revenu Quebec didn't process it (presumably because the Schedule D information was missing from the keying information at the from). I only noticed we hadn't received it this past week in doing my taxes. I wonder how many other Quebecers are in the same boat. Like you, I re-submitted it recently using a TP-1-.R-V.
This year, we did the same thing (printed out the form manually and included it), but I also included a letter at the front of the package explaining the situation. Hopefully I won't need to do an ammendment again.
I suspect this issue only affects people who file by printing and sending it in by mail. Unfortunately, my tax situation is unique enough (for other reasons) that netfiling is not possible...
