LibASS (0.9.6)
 * Various fixes and updates to match VSFilter renderer.
 * Support \blur tag and ScaledBordersAndShadow property.
 * Fractional arguments and subpixel accuracy.
 * Keep positions when pan-and-scan is used.
 * Lots of bugfixes and other changes.

LibASS (0.9.5)
 * Support '=' and '.' in style name in arguments to ass_set_style_overrides().
 * Allow overriding [Script Info] parameters with ass_set_style_overrides().
 * Add workarounds for some buggy fonts.
 * Remove buggy workarounds for some other fonts.
 * Fixed ass_set_line_spacing() (was broken before).
 * Negative margin sizes are now used for image cropping.
 * Better handling of behind-the-camera objects.
 * Case insensitive parsing of SSA/ASS section headers.
 * Improved font matching.
 * When 2 styles have the same name, the later one is used.
 * Fixed several other bugs.
