This is not exactly a php question so feel free to move it if needed.
I notice that when I submit a a memo post with a tag that has a space in it the tag occasionally is encodes the space as %A0 and at other times as %20. Both seem to be the code for a space, but what is the difference? I need to know so that I can keep the spaces submitted as %20 as opposed to %A0, which would end up creating a duplicate tag in my database.
My efforts to determine the difference have not been successful so far.