Interesting feature in the McAfee Security Center. There is a checkbox option under 'Internet and Network' for "Block advertisements that appear on Web pages when you browse the internet." Sounds like a good feature to have.
However, this is what I have found. I created a new Module and placed an image (.jpg, .png, etc.) into the content area of the module, and assign to a position, and publish. The image appears correctly with the above security preference turned "off". If the preference is turned "on" the image does not appear, and looking at 'view source' on the page, the actual code is not even there - it is stripped out when the page is rendered - thanks to McAfee Security.
It appears it is all in how J! delivers the content. I have used RokSlideShow in the same position and it will render correctly. Conversely, the default 'Banner' module images are stripped out - no matter position placement.
I am still learning J! features. I would like to place an image in a position similar to layout used in Versatility III and Colormatic - like in the Advert1, User1 areas. Can someone tell me how this is done as seen in the Demo templates? I can test a solution and report back on the findings.
Upon further investigation I found the problem was related to an absolute path for the image. I am currently using JoomlaFCK Editor and found that there is a know bug at that the time of this post (
http://joomlacode.org/gf/project/joomlafck/
)
The editor puts in an absolute path. If you were to View Source and change the path manually to a relative path (i.e. /images/stories/myimage.jpg) then McAfee does not treat it as being served dynamically - triggering the security suite to block the image.