For those wanting to try out Bootstrap 3 against an existing Bootstrap 2 site... note that if you use anything other than 12 columns that it won't work yet.
Simply: The grid is hard-coded to be 12 columns.
If you want more or less, then you need to adjust less/grid.css manually and reflect that in column count within less/variables.css and use grunt to rebuild.
Aside from the generation of custom grids being broken, no complaints about the rest and we've been following the bleeding edge for several months now and it's been fine. Yeah a couple of things have broken, but every change has been an improvement and that's a good thing.
Simply: The grid is hard-coded to be 12 columns.
If you want more or less, then you need to adjust less/grid.css manually and reflect that in column count within less/variables.css and use grunt to rebuild.
Aside from the generation of custom grids being broken, no complaints about the rest and we've been following the bleeding edge for several months now and it's been fine. Yeah a couple of things have broken, but every change has been an improvement and that's a good thing.