database name quoted error in backup command.

pgadmin ver 1.12.2 on windows
when backup a database name 19
the backup command log show as below:
I:/PostgreSQL/9.0/bin\pg_dump.exe --host localhost --port 9007 --username
"postgres" --format custom --blobs --verbose --file "r:\test.backup" \"19\"
pg_dump: [archiver (db)] connection to database ""19"" failed: FATAL:
database ""19"" does not exist
pg_dump: *** aborted because of error

Process returned exit code 1.
-------------------------------------------------------------------------
two command below run fine.
I:/PostgreSQL/9.0/bin\pg_dump.exe --host localhost --port 9007 --username
"postgres" --format custom --blobs --verbose --file "r:\test.backup" "19"
or
I:/PostgreSQL/9.0/bin\pg_dump.exe --host localhost --port 9007 --username
"postgres" --format custom --blobs --verbose --file "r:\test.backup" 19

yangjun
杨军