print pdf/html fails after upgrade 1.1.12 -> 1.2.9

["Max van Biezen" <..hidden..>]

Hi,

I have upgraded from 1.1.12 to 1.2.9. All seems to work well except
for printing to screen (print to paper fails as well).

Whatever I select in order to print an invoice I get the message:
Attempt to free unreferenced scalar: SV 0x24780b0, Perl interpreter:
0x604010 at bin/io.pl line 1600.

Any suggestions how to solve/debug this?

The complete error when printing pdf to screen is:

Attempt to free unreferenced scalar: SV 0x24780b0, Perl interpreter:
0x604010 at bin/io.pl line 1600.
Content-Type: application/pdf Content-Disposition: attachment;
filename="1195413295_invoice_000330.pdf" %PDF-1.4 3 0 obj << /Length
144 /Filter /FlateDecode >> stream
xïeï=1Dïï-/Eïï&ïÜÕïïïïR9ïï9D#ï 3ïï
ï,..hidden..'(#DFï>Bï9dïrïuKï/ïïPEïïfUïï5T<ï N73/Âïcï
+<.0~!ïï/6ï{iïs}ïïïïïiï;Nïïpïïï(ïïïï/

Kind regards,

Max.