Using Moodle 2.0 dev (Build: 20080625)
impossible to display Participants list, with debug on I get the following errors:
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Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 360

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 361

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 362

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 363

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 364

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 365

Notice: Indirect modification of overloaded property moodle_session::$flextable has no effect in moodle\lib\tablelib.php on line 368

Warning: Attempt to assign property of non-object in moodle\lib\tablelib.php on line 417

Warning: array_reverse() [function.array-reverse]: The argument should be an array in moodle\lib\accesslib.php on line 3469

Warning: Illegal offset type in isset or empty in moodle\lib\accesslib.php on line 467

Warning: Attempt to assign property of non-object in moodle\lib\adodb\adodb.inc.php on line 1820

Warning: implode() [function.implode]: Bad arguments. in moodle\lib\accesslib.php on line 1170

Fatal error: Cannot redeclare _rs2serialize() (previously declared in moodle\lib\adodb\adodb-csvlib.inc.php:34) in moodle\lib\adodb\adodb-csvlib.inc.php on line 79