Comment 6 for bug 1191700

This system has been working fine with no errors at all for several months since the original installation of Saucy.
The problems started suddenly on the 14th after applying the set of saucy updates dated 2013-06-14. There are no hardware errors.

It's a bit worrying if updating a system can corrupt it. The updates were all signed and signatures verified by USC. Perhaps Debian or Ubuntu signing keys have been compromised again.

The file you mentioned exists, is world-readable, though not executable, and is identical to the one on a different Ubuntu system.