The remote host is missing an update to pimd announced via advisory DSA 2147-1.
Vincent Bernat discovered that pimd, a multicast routing daemon, creates files with predictable names upon the receipt of particular signals. For the stable distribution (lenny), this problem has been fixed in version 2.1.0-alpha29.17-8.1lenny1. The testing distribution (squeeze) and the unstable distribution (sid) will receive updates shortly. We recommend that you upgrade your pimd packages.