sleepybrettOf course not, but leather straps will definitely stretch out over time. Probably pretty quickly too if the case is used for frequent travel (which I would imagine this case is ideal for otherwise).
fernandeznot true for me after 5 months. Besides, it's leather, it will shrink, soak it, coat your case in thing plastic wrap and apply the straps, they will shrink as they dry. Worst case, they are just stiched together, take them to any cobbler and they'll restich it tighter for a few bucks.