No idea if this is 'by design' or not but the icon on the tabs in chrome changes between the "old" forums (like lounge, site bugs/sugs , ....) and Q/A.
It's a very small difference tho but I think the Q/A one is newer (where the head of bob comes above the orange) and the "old" forums still have the old icon (where bob is completely on a orange background)
I think you mean the main logo that is in the top banner.
Not that one
When you open codeproject in chrome (or IE) the tab (from chrome / IE) displays the codeproject logo on it.
In chrome these logo's differ between the forums and Q/A (and probably other places)
In IE10 they don't
Haven't tested in FF.
I am still seeing it, even after obliterating the cache, browsing history, and download history. Chrome Version 26.0.1410.64 m. Article lists have a favicon with white bars, other places have one that is solid orange (Both have Bob on them).
Firefox does the same thing. As does Internet Explorer 10.
I think you may have a rogue favicon somewhere in the CP website tree.
Image upload has been suggested, proposed, discussed, debated and then destroyed number of times. The reason being it is highly insecure and may bring in a lot of parental control and IP issues.
However, you may like to host the image elsewhere like in Picassa or Skydrive and proceed sharing the permalink of the same along with the thread. You may however like to note that content posted by your account is also governed by the Terms of Service oath you had taken whilst signing up for the account.