The character used as a preg_* delimter is the tilde (~) char, but this
was not passed into the `preg_quote()` when taking the user input
($CFG->wwwroot).
As a result, any site which uses a userdir fails to parse the regexp.
A new plugintype has been created for having more than one installed
third-party H5P libraries. Existing libraries have been moved from
lib/h5p to the new h5plib_v124 plugin.
We are renaming existing h5p_filter in 3.8dev to h5p_displayh5p to avoid collisions with filter_h5p plugin
in Moodle plugin directory.
Everybody having a 3.8dev installation with filter_h5p plugin should drop the old filter or re-install from scratch.
Andrew Nicols