With some discussions about this problem - i would strongly recommend to not update to a version after 2.1.0p16 if you are on an older version. If your system is already on p17 or newer then ok you are not affected until now with this problem and can update. As it is nearly impossible to check before an update if a system is affected i find it very dangerous for big production systems.
Also missing inside this Werk is the last save version before this bug was introduced.