This may cause us troubles.  Apt ships with PE, and PE uses stdlib 2.2.  It's kind of an awkward situation because we're trying to tread a middle ground between not making it harder for PE users until a permanent solution is created to deal with this problem in PE.

As a kind of workaround for postgres we ended up making pe_postgres in PE, which the same public module with all the resources and classes renamed to add pe_, which isn't cool.

Basically what I'm saying here is we can bump it if we needed functionality in 3.2, but otherwise we should leave it at 2.2 until PE 3.3 or so when we'll hopefully have a permanent solution to the self inflicted pain we've caused everyone. :D