For example, if I were to type "/give @p potion 16 0" in previous snapshots, it would give you a stack of 16 water bottles. This no longer works as of 1.8-pre2. Not sure if it was ever even intended, but I just thought I'd post it here.
MC-69693
/replaceitem and /give no longer give stacks of not-stackable items
Resolved
Duplicate
0
WAI. MC-3444
Its actually still possible via /replaceitem.