Links in Summaries don't show

I’m using version 1.4.2 of Frantic and noticed that links within summaries on the front page don’t always show.

My web site can be found at https://www.fokmcast.com. It’s NSFW in language but should be OK otherwise.

An example of this problem can be found by comparing the article here:

https://www.fokmcast.com/2013/09/04/cheap-laughs-get-some-patrice-oneal-now/

to its summary on the front page on the main site. Notice how Humble Bundle is not linked in the summary text.

I also use an Amazon referral plug-in, and if it’s used in the summary the link and its corresponding text disappear.

See https://www.fokmcast.com/2013/09/20/saving-sarah-silverman/ and compare it to the front page (note that the text linking to the Comedy Central Roast of James Franco is removed from the summary on the main page).

Thanks in advance,
Kevin