The basic issue here is that any file paths that you use in svManager will turn into URLs for the galleries. Many servers will accept characters (such as question mark) in file and directory names, that cause trouble in URLs. There is a large grey area of characters (e.g. space character) that are not recommended for URLs but usually work in practice.
The next release of svManager will take a different approach to this issue. The following characters will be fully acceptable in svManager file paths and URLs:
ALPHA / DIGIT / "-" / "." / "_" / "~"
This will bring svManager into line with the list of 'unreserved' characters in RFC3986. Note that this list includes the dot character. ALPHA will usually include accented characters, umlauts etc but that depends how your server is set up.
If you use a character that is rejected by your server as not acceptable in a file path then you will get an error – no change, that's what happens now.
If you use a character that is ok in a file path but not in the acceptable list for URLs then you will see a notice on the customize screen but you will be able to carry on using it. The notice will remain until you remove the character. Note that we are talking about the file path from the web root, i.e. including the path from the web root to the svManager directory itself, since that is what is going to appear in the URLs.
The whole idea is to give you more flexibility while letting you know when you might be introducing problems for some gallery visitors on some browsers or possible problems with future browsers releases.
SimpleViewer Support Team.