I've played 30", 32", and 34", sometimes switching between two of those during a gig, and I've really never had a problem with fret spacing or wrong notes.
I actually used to have a bigger (but still minor) problem occasionally when going from a 24-fret bass to a bass with fewer than 24 frets, if I had a part where I moved quickly into the highest registers where I was relying upon the marker dots to place myself, because the "geography" can look different up there when you have fewer (or more) dots due to the number of frets.