[HELP NEEDED] array serialization and inserting into database

[eluser]WanWizard[/eluser]
You probably use a .htaccess that has rewrite rules in place testing for file or directory existence (the -f and -d flags) to prevent rewriting.
Which means that if you made a typo or used an image in your page that doesn't exist, the request for that asset is rewritten to index.php.

Add some debug code to write the requested URI to the log (see here for an suggestion).