Seconding Dee. There will always be parts of a novel that are equivalent to scene-shifting in the theatre: more functional than thrilling. In fact, yes, you need these breathers. But there should always be a good, solid purpose for them - they should be really
necessary, and if they are, the reader won't find them boring. Apart from anything, it's amazing how much scene-shifting seems necessary in the early drafts, when you're working out what happens yourself: later you'll often see you can just do a jump-cut to the next important bit. As Dee says, as the writer you're not always the best placed to judge whether they are or not. Yet again, reading aloud can make you hear it afresh, and so can putting it away for a while... At least till your hangover's gone.
Emma