For PDFs with rotated pages that extract (or are rendered) as PNGs, that's correct. For PDFs with rotated pages that extract embedded JPEG images, any version of GdkPixbuf should support this change. If the GdkPixbuf version is too old, rotated pages (a fairly uncommon thing in PDFs) extracted as PNGs simply won't display rotated — other than that, everything will work normally. (There's also the issue that the thumbnails currently display unrotated, but that's an MComix bug that occurs with all...
Native PDF: Embed page rotation as EXIF
Native PDF: Embed page rotation as EXIF
Check in new baseline lilypond files
Move autoBeaming disable inside Voice context
Add second lilypond-tied-grace-notes example/test
Also track groupInGrace status
Beam grace notes and regular notes separately