I have many times found CSS written on my screen besides images from Stack OverFlow.
It is associated with the advert from Rackspace
Here is a screenshot:
This looks like an advertiser forgot to put an opening tag in their HTML, and did something like this
width="0" height="0" style="position:absolute;" etc etc>100% ssd, 10 GigE blah blah</div>
Fairly easy to fix, but not sure how it got past the people in charge of putting the ads on
@Vivek I can't seem to reproduce this error. Are you (or anyone else who experienced it) still observing this issue?
I checked out the question you took a screenshot of above, and even when ads for that advertiser appear I don't have that issue.
The campaign in question is now paused and the advertiser is in the process of sending us new creative. Will update here when new creative is live.
The advertiser updated their tags and this campaign is now live again. If anyone observes any issues, please let us know.
I was able to desolate the bug. When it breaks, this is the generated HTML: (the
width="0" height="0" etc are right after this, outside the tag hence showing bare on the page)
<img src="http://data.cmcore.com/imp?tid=17&ci=90378805&vn1=4.1.1&vn2=e4.0&ec=UTF-8&cm_mmc=SMB12Display-_-StackOver-_-Dev-_-PerfLanguage<http://data.cmcore.com/imp?tid=17&ci=90378805&vn1=4.1.1&vn2=e4.0&ec=UT%20F-8&cm_mm" c="SMB12Display-_-StackOver-_-Dev-_-PerfLanguage">
The "proper" HTML of this ad is:
<img width="0" height="0" style="left: 0px; top: 0px; position: absolute;" src="http://data.cmcore.com/imp?tid=17&ci=90378805&vn1=4.1.1&vn2=e4.0&ec=UTF-8&cm_mmc=SMB12Display-_-StackOver-_-Dev-_-NewPerfStandard">
It appeears to be server side and only happen on first hit, or after hard refresh.