I've decided to take the temperature on a known issue, that lvclass files retain knowledge of some of their old content after it's deleted.
For some reason I'm not allowed to upload lvclass files, so I'll describe it instead (using LV2014SP1):
1) Create a new class and save it on disk as class1.lvclass. No member data nor methods, file size on disk is 8 kB.
2) Add one piece of significantly sized (to easier see the issue) member data, I added a 1000x100 array of DBL (w