Isn't work for me,
i restore old parser.php file, now is work.

Hello,

I recently upgraded to the latest PunBB version, but all posts with use BB-code tag is now empty for read.
Downgrade to 1.4.3 solve this problem.

installed extensions:

BBCode buttons 1.4.18 disabled
GeSHi Highlight 1.0.5 enabled
SC WYSIWYG BBCode editor 1.4.0 enabled