Recently, ACTV announced a renumbering of several vaporetto lines, effective November 2, 2011. Here's a handy chart to help make the transition. I can't even imagine what kind of havoc this is going to cause with all the maps of Venice having the old numbering system on them. I still see maps with Line 82 (changed to number 2 several years ago) on them. All very confusing for tourists, I'm sure.
Everything looks pretty easy enough, except for whatever they did to the LN line. It's now 10, 12, 14 and 14L ??
It will be lots of fun for awhile. I'd better print this chart out!