Sure, you need to be in a position where you _can_ walk away from a job - and be fairly confident you can pick up another one promptly, but leaving company A in Feb and starting at company B in April isn't something that'll raise questions about your CV - not the way leaving company A in Feb and starting at company B in June or August will.

It's a pretty good time to be a developer - most of us don't need to hang around under asshole bosses just to keep the rent paid next week. If you start a new role, and the red flags are waving madly on day 2, strongly consider walking out.

This advice won't apply to first-job-put-of-college devs, in that case you might just need to suck it up for a year, and put off buying that flash new car or taking that trip to Vegas until you've got 6 months living expenses saved (Note, may also not apply so well to fairly well paid junior or mid level devs who've gone way too deep with SF housing rental either... Same advice applies, build up a six month living expenses savings, so you _can_ afford to walk out on an asshole boss if you need too...)

Is it really? If the fields are that small, wouldn't other people know what kind of an ass that boss is, too?