I have a simple map which illustrates a problem in the current 
iteration of V3.4: 

http://www.luxcentral.com/bug/bug3.html 

This map has a single marker with a dblclick handler attached. The 
handler is supposed to center the map around the marker position and 
zoom in one level. 

All works well with V3.3. 

With V3.4, the marker is not centered on the map when you double click 
it. After double-clicking, the map center moves to somewhere north of 
the marker (so much so that the marker moves off the map and you have 
to pan down to see it). 

This seems to have started happening on February 28.