Try a new flag...  I may revert this later after more extensive testing...
Fixed some signifcant logical issues with when/how to playback audio
items (in a stable manner).

Rather than blaming 'low quality wav files' for my new code crashing per
normal Linux audio developer tradition, I debugged the piss out of my
code until I uncovered the cause of the SEGFAULTs, then I fixed it...

Not to say that my audio tracks are a finished product, but I totally saw
this as a "if I don't fix this now, it will cause my application to be
an unstable turd forever just like [insert name of competing DAW]" kind
of moment.

First rule of stable development:  The smallest development milestones
possible, and do not proceed to the next milestone until the current
milestone if free of crashes and passes Valgrind with no memory errors...