Thread:Project:Support desk/search box formatting anomaly

I'm in process of commissioning a new server with the latest stable releases of both MW,SMW and loads of extensions. Once running sweetly it will replace the current production server. It accessible here and is currently populated with a fairly recent backup of the production site to facilitate thorough debugging. The SSL cert will be reported as invalid because it is the production site cert and being used for Apache config/debug purposes only.

I have resolved multiple issues easily enough but not this one - yet: The search-box prompt and any type-in text appears below the actual box. Any pointers to fixing it would be much appreciated.