rpm hangs for root

[Andras Simon]

On a fully updated FC5 (as of say, 2 days ago), when started as root,
rpm hangs even for simple queries. The last few things it does
(according to strace) are:

open("/var/lib/rpm/Name", O_RDONLY|O_LARGEFILE) = 4
fcntl64(4, F_SETFD, FD_CLOEXEC)         = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=40960, ...}) = 0
futex(0xb7d32900, FUTEX_WAIT, 2, NULL

This doesn't happen if I start rpm as a normal user (and has never
happened before for root). I see no selinux related messages in the
logs.

Any ideas?

Andras