color moire pattern on fine texture

[jpbeale]

I have noticed an objectionable pattern of yellow and blue stripes on a shirt in one of my D30 shots today. Here is a crop showing the problem:

http://www.best.com/~beale/D30/D30-moire.jpg

(original was JPEG large/fine mode, ISO 200, 1/60, 50 mm f/1.8 lens at f/4, with flash)

Is there something I can do to prevent it (besides leaving the shirt out of focus) ? Is there an easy way to remove this kind of problem in post-processing?
I assume the problem is from the sensor, and RAW mode would not have helped.

Given that this must occur with very specific spatial frequencies in the image relative to the RGB filter pattern on the sensor, there ought to be some fairly clean software fix for it (?)

[jpbeale]

As a followup, I contacted Canon's online tech support and they simply referred my to Canon's phone support line. The phone support guy said he'd never seen color aliasing on the D30 but he couldn't evaluate any issues, the only option would be to send the camera in for service and see if the factory can find a problem. I suspect that my D30 is average and they will all show moire effect on sufficiently fine contrasty detail, but I can't confirm this. From what I can gather there is no Canon service rep. anywhere who can have any technical discussion with a customer about the camera, beyond reading from the manual- I admit that this is not unusual for consumer hardware, but I had hoped for more.

[sasc]

I am having pretty much the same problem. I get jaggies on any straight lines and see red and blue coloring in metallic greys.

I called Canon tech and although he was very nice seemed to know nothing. He said he would have his supervisor look at my photos online and I'll get back with him next week.

Ive asked in a number of forums and if anyone answers they say they dont have this.

My Pro90 and Casio dont show this and its pretty discouraging to see it on this camera. It shows up in jpg or raw and with any lenses I use.

http://www.pbase.com/sasc/tests