Recent stability issues with *buntu 14.04?

[John Hupp]

A Lubuntu 14.04 i386 machine that also runs an LTSP server has locked up 
hard 3 times since 5/7.  I took note in the latest lockup that I was 
logged in and just running the file manager, and that one thin client 
was logged in but not doing anything.

Not even the magic syskeys would get me out gracefully, so I had to do a 
hard shutdown in all 3 cases.

The last syslog entry was 15 minutes prior to the lockup, so no clues there.

Has anyone else with a similar configuration noticed any stability 
issues recently?