Sorry to 'ressurect' this old topic, but I am posting my recent experience with this every place I can to try and raise awareness, and find solutions.
I, too, am suddenly seeing theses same underlined word links from something called "Infolinks". It is my Mac OS 10.6 at work, and I have installed nothing new on it. When I turned it off on Friday I was not having this issue. So what has happened between then and now? The only thing I can think of is that possibly Chrome, or one of it's extensions; being a work computer, it is set to automatically update.
My list of extensions is short, most of them being from Google themselves;
- Google Chrome 16.0.912.75
- AddThis - Share & Bookmark (new) 2.9.2
- Evernote Web Clipper 5.1.20.4691
- Google +1 Button 1.1.2
- Google Mail Checker 3.2
- Google Reader Notifier (by Google) 1.3.1
- Instapaper 1.2
- Reader Plus 4.0.1
- RSS Subscription Extension (by Google) 2.1.3
- Shareaholic for Google Chrome™ 5.1.0
- TinEye Reverse Image Search 1.1.1
Oddly, a similar thing has happened on my home Windows 7 computer - only on that computer, it's not just Chrome these show up on, but Firefox as well; and from something called "Text Enhance".
So I am having to go through each extension and plug-in to find the culprit - my guess, due to the only commonality, is it was blindly inserted into the browser through installation/updating of either Instapaper or Evernote - which is disappointing, since I use and love both. I'll have to read their update/changes list to see if it's mentioned.
Though, it is also likely one of the Google extensions that is (unknowingly?) the culprit. Anything is possible. I'll let you know if I find the answer. So far, in my research, it has resulted from a large number of various and different reasons - most being an extension or program (and one that is usually trusted).