Canon new sensors have special tin oxide coating (currently in Mark III, Canon 5D and Canon 400D / XTi).
This coating can be defected if treated with standard Eclipse (one of best CCD/CMOS cleaning tools on the market).
Manufacturer has confirmed this and now offers updated version of Eclipse.
If you have one of above sensors, DO NOT use old version of Eclipse on them!
P.S. It looks like the best and most secure way to clean sensor is still good old air blaster (I use similar blower, just local brand)
thanks to my friend Vlado*, who told me about the problem
* Keep your fingers crossed - soon, he might post some of his great photos on this site. And share some tips
Photographer about Microstock - great opportunity or just for fun Thu, 12.11.2009 01:23 I would like to add http://www.yaymicro.com
Very nice site with a great interface. 50% comission to photographers.