You failed to mention the model number of your new Sony, but I think it is either one of the new "T" series or the W170.
I understand your dissatisfaction with the new camera as compared to your S75.
The S75 was released in early 2001 and was one of the top of the line from Sony. It originally cost about $700.
Now you are comparing it to a new camera that costs about $300.
The new camera has more bells and whistles, but not the quality of the old camera.
It is a bit like comparing a 2001 Buick Roadmaster to a 2008 Chevy Malibu.
Shortly after 2001, all the camera makers started to cost reduce their digital cameras. This has continue ever since.
Megapixels has been a blessing and a disaster.
When they got to 7 megapixels they should have stopped.
The S75 has a f/2.0 lens with 3X optical zoom, which all the camera makers have abandoned because it cost too much to manufacture.
The S75 performed better in low light than ANY of the newer (non DSLR) cameras.
The only new (non DSLR) camera that can possibly be compared to the S75 is the Canon G10 or possibly the Panasonic LX3. And both of them will fall short regarding low light performance.
Megapixels don't make the picture any better.
Once they went past the very early 7 megapixel cameras they reduced the sensor assembly size so that they could use smaller diameter lenses. CCD sensor noise increased significantly.
The only thing I can suggest on your new camera is make sure that you have digital zoom turned off.
Digital zoom will reduce the quality of the pictures.
Avoid taking pictures in low light without flash, unless you use a tripod to support and steady the camera.
I am once again confused with photography. I had a Sony DSC-S75 3.3MP that I thought took very clear pictures. A while ago I bought a Sony Cyber-shot 10.1MP camera and in my opinion the pictures are worse on the Cyber-shot than the DSC. I bought the DSC in 2001 and the Cyber-shot in 2008 so I thought that technological advances would surely make the Power-shot the winner of picture quality. They both have Carl Zeiss lenses so the only obvious difference is size. Is the difference in photo quality due to the size of the cameras? The Power-shot is definitely smaller but I didn't think it would make a big difference. If so, what's the point of more megapixels if they don't make the picture any better. I understand that if you zoom they are important but I don't zoom even half of my pictures so isn't that a waste?