Slower shutter speed is par for the course im affriad its the way it works, it has to have a slower shutter to allow more light in in poorly lit conditions, having faster shutter speed would only cause your images to be dark, no amount of frimware can solve this. Only thing you can do if possible is to turn your iso up, this will give a faster shutter speed but on the downside your are increasing the chances of noise, you need to find a happy medium, alas most p&s's struggle in low light.