Cannot use underscores in search filters - 1.8 Alpha2

Seems underscores on any of the search filters on some, if not all, sections of the CMS is non-functional. It looks like the system removes the underscores from the search string. Is this by design?

It should be possible to use underscores - I am not sure why they would be stripped.

@Peter please can you look into this and create a bug report if confirmed?

There indeed seems to be some issues with underscores.

Confirmed & logged: