plugin WordPress Database Backup breaks plugin SyntaxHighlighter Evolved

The plugin
http://www.viper007bond.com/wordpress-plugins/syntaxhighlighter/
version 3.1.3

breaks, i.e. doesn’t change the properly enclosed codes as long as the plugin

http://www.wordpressconnect.net/wordpress-database-backup-plugin/
version 7.9.1

is activated. Upon deactivation, it works as advertised.