Seems to be the same problem as described here:
Tested it with Parole 0.52 and 0.60.
SSA/ASS subtitles are just not displayed and no error messages are generated (Compiled with --enable-debug=full and run with --gst-debug-level=4).
Furthermore I tested with both gstreamer 0.1 and 1.0 yielding the same results.
In the reference bug report are test files to illustrate the bug.
On further testing I observed that ASS subtitle rendering works if the subtitle is within a mkv container.
It seems only to bug out with external subtitle files.
It looks like this is an ongoing issue for gstreamer. There is a new plugin for gstreamer that handles this, however not automatically. I'll look into implementing this over the next few days.
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