Using CS6 Beta on an iMac, OS 10.6.8.
I've noticed that in the color dialogue you can enter hex numbers that are 8 digits long (apparently 8-digit hex codes are used in Android). However, when you put in an 8-digit code and click OK, you get the error:
"A number between 000000 and ffffff is required. Closest value inserted."
Based on an internet search I did it looks like the extra two digits for Android represent an alpha channel. This isn't available for Photoshop's color picker, so six digits is the max. Thanks for the catch.
On a related note, shorthand hex colors (3 digits) are now allowed in CS6. For example, typing "abc" will now get you "aabbcc" instead of "000abc".