Isnt the plugin version defined as a const String[] in the myinfo struct?
I think so, %f wouldn't work, because a plugin version value can be any string.
%s is the format string for a string, and you can look at the various other values here:
http://wiki.alliedmods.net/Format_Cl...eMod_Scripting)
In short, you'll need to know what type of value you are trying to print out to the chat window. The in-memory representation of a value varies depending on its type, which is why you'll need this. You can try to format a integer as a float point value, but it won't be what you expect, and vice versa.