Filter Image Without Type on OSX?

[Scott Rossi]

Hello List:

Is it possible to use any kind of wildcard with file filtering on OSX?

I have several JPEG images that show no file type (just the empty boxes)
which often happens when Preview gets ahold of them.  Then when trying to
filter a list of images in an answer file dialog using "JPEG", the
aforementioned JPEGs are grayed out and not selectable.  Is there any way to
work around this?  (Rev 3.5)

Thanks & Regards,

Scott Rossi
Creative Director
Tactile Media, Multimedia & Design