> How exactly were you running this command ?
1. after restore slony complains on sync commands.
2. 
update functions (id = 1);
update functions (id = 2);
update functions (id = 3);
repair config (set id = 1, event node  = 1);

3. this corrected problem on master, but no on slaves, because slave has
some syncs in queue before reset config

4. i run then
update functions (id = 1);
update functions (id = 2);
update functions (id = 3);
repair config (set id = 1, event node  = 1);
repair config (set id = 1, event node = 2);
repair config (set id = 1, event node = 3);

and all nodes (master and slaves) are crashing. (segfaulting)