Maybe? I can see a little of what looks to be high iso noise in the room shot.
I wonder where you have the noise filter set and at what ISO this was taken. With my E510 I can see some grainy noise when over ISO 800 with the noise filter off.
Other settings that may help when shooting raw ..
sharpen = -2 (lowest setting)
contrast = -2 (lowest setting)
noise filter = off when less than ISO 800 .. well try some experiments but the detail is better with noise filter off to my eye
I find when shooting outside here in Arizona with the intense sun that there seems to be a tendency to overexpose the blue channel. I now usually use a polarizing filter during mid day when the sun is high.
Then in the raw development ..i.e. Olympus master or Raw Therapee you can adjust the contrast, and sharpen as a last step before converting to .tif or .jpg and get better results. There are other products that I have not personally used .. lightroom, Adobe Camera Raw / Photoshop, Silkyprints.. and more.
there is a very good overview of how to get the E510 setup here:
and some related links you may find helpful:
http://www.wrotniak.net/photo/oly-e/e51 ... tml#CUSTOM
the latter link also has some very interesting tests and comparisons of the E510 kit lenses vs a few of the top end name brand optics .. if you own an E510 you will no doubt be re-assured of the great value after reading these articles.
and .. both of these links have nothing but praise for Gordon's review and both provide links to the Cameralabs video and review of the E510.