Some problems when testing with the latest Version 2.0.0

[lori.lin]

I've met with two problems .

zabbix version: 2.0.0 released

arch: server - proxy(s) - agent(s)

Problems:
First,
I've setup some proxies . When tried to delete some one . I got error message

"Error in query [DELETE FROM interface WHERE (hostid IN ('10097')) ] 
[Cannot delete or update a parent row: a foreign key constraint fails 
(`zabbix`.`items`, CONSTRAINT `c_items_4` FOREIGN KEY (`interfaceid`) 
REFERENCES `interface` (`interfaceid`))] SQL statement execution has failed
 "DELETE FROM interface WHERE (hostid IN ('10097')) "

Second,
when use the default "Mounted filesystem discovery / Network interface discovery". I got error message

" The item is not discovered anymore and will be deleted 
in 29d 23h 51m (on 27 Jun 2012 at 11:08:08)."

It seems like the item been discovered "on 27 Jun 2012 at 11:08:08 " but some factors got unstable and the item just shown up and down all the time while the trigger had been added for a half day .
The triggers related to the discovery rule shows error

"Trigger just added. No status update so far."

Thanks and keep up the great work!