Minor drawback with Memcached
While it isn't normally an issue (most people don't deal with this oddball system), if we were storing those results longer than we had been, this could have been a huge issue. It was rendering product pages non-functional, which isn't a good thing.
As a result of this, we're going to start doing more error checking and trapping. Oh what fun it is to deal with systems that don't care about being valid in the slightest and having Perl modules that require it.