Fixed compiler warning (check SM forums for details), fixed compiler crash, seemed to be caused by the string parameter not being defaulted to an empty string, using new String:... had no effect, so I went through and defaulted all String parameters to (not uncluding constant expressions).

src/zr/playerclasses/playerclasses.inc

@@ -688,7 +688,7 @@ ClassClientSetDefaultIndexes(client = -1)
  *                  index will be used as a client index.
  * @return          Number of cells written.
  */
-ClassDumpData(index, cachetype, String:buffer[], maxlen)
+ClassDumpData(index, cachetype, String:buffer[] = "", maxlen)
 {
     new cellcount;
     decl String:attribute[320];