On certain pages within fronter we use HTML A tags referencing content on networked drives local to our school pointing to video content which is too large to run off or load onto Fronter.

This has always worked up to when recent updates were applied to Fronter. Now when we click on a link to the videos from Fronter, there is no response at all from the browser (both IE 9 and Firefox, both XP and Win 7), although if you hover over the link, it appears to be correctly formed, and if you copy the link and paste it into the address bar, it functions.

On running wireshark, it appears that the fault is rather technical - for me at least.

It appears that a request is sent to the fileserver "QUERY_PATH_INFO, Query File Basic Info" on a path of the file, but with ":Zone.Identifier" appended to the filename.
What comes back is an error "QUERY_PATH_INFO, Error: STATUS_OBJECT_NAME_NOT_FOUND".
This is where the conversation between client and file server ends.

If you do a similar scan outside of Fronter, this request is not sent, and the video loads.

Any ideas why this behaviour has started to happen, and if we can fix it at all?