Glob

Please can someone help me understand the following: I have 4 images with a .jpg extension in a folder. The following reads all four: $files = glob("thumbs/{*.gif,*.jpg,}",GLOB_BRACE); All good, however, I noticed that if the extension is in capital letters, eg .JPG it doesn't work. Apparently this is because when using *. in glob it's case-sensitive (I have RTFM/STFW) So, I would expect the following to work, but it's reading each image twice! $files = glob("thumbs/{*.gif,*.jpg,*.jpeg,*,png}",GLOB_BRACE); What am I missing?