Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.206.2.26
diff -u -r1.206.2.26 bootstrap.inc
--- includes/bootstrap.inc	5 Jul 2010 21:41:38 -0000	1.206.2.26
+++ includes/bootstrap.inc	26 Jul 2010 11:22:54 -0000
@@ -566,7 +566,11 @@
 }
 
 /**
- * Return a persistent variable.
+ * Returns a persistent variable.
+ *
+ * Case-sensitivity of the variable_* functions depends on the database
+ * collation used. To avoid problems, always use lower case for persistent
+ * variable names.
  *
  * @param $name
  *   The name of the variable to return.
@@ -584,7 +588,11 @@
 }
 
 /**
- * Set a persistent variable.
+ * Sets a persistent variable.
+ *
+ * Case-sensitivity of the variable_* functions depends on the database
+ * collation used. To avoid problems, always use lower case for persistent
+ * variable names.
  *
  * @param $name
  *   The name of the variable to set.
@@ -609,7 +617,11 @@
 }
 
 /**
- * Unset a persistent variable.
+ * Unsets a persistent variable.
+ *
+ * Case-sensitivity of the variable_* functions depends on the database
+ * collation used. To avoid problems, always use lower case for persistent
+ * variable names.
  *
  * @param $name
  *   The name of the variable to undefine.