Bugs in grace notes in 2.12.3

[Vivian Barty-Taylor]

I'm struggling with bugs in grace notes in the latest stable release  
(2.12.3) and wonder if anyone has mentioned this yet? I'm getting  
incorrect stem attachment, incorrect durations and altered size. If no- 
one has yet mentioned it, I'll prepare a bug report for bug-lilypond.  
Also any suggestions as to how to solve this pro-tem?

See attached code snippet and PNG.

%%%%%%%%%% Lilypond 2.12.3

%25
\acciaccatura { \normal fis,16~[\pp g~] }
\gs <fis g d'>2 \gso \acciaccatura { d'16[ g,] } fis4 \acciaccatura  
{ fis16[ g] } \gs d'4