Clone lists for 3.0 compatibility. Closes #1.

code/GridFieldOrderableRows.php

@@ -244,6 +244,7 @@ class GridFieldOrderableRows extends RequestHandler implements
 	}
 
 	protected function populateSortValues(DataList $list) {
+		$list   = clone $list;
 		$field  = $this->getSortField();
 		$table  = $this->getSortTable($list);
 		$clause = $this->getSortTableClauseForIds($list, 0);

composer.json

@@ -11,6 +11,6 @@
 		}
 	],
 	"require": {
-		"silverstripe/framework": ">=3.1"
+		"silverstripe/framework": "3.*
 	}
 }