Solved. External feed idea was correct, figuring out feed was slightly more complex.

I had installed Core Control plugin and enabled log of HTTP requests.

Then it was just sitting and waiting until error re-occurs and checking which feed was downloaded at exactly same time.

Subject feed:


belonged to one of recently installed plugins;
was fried dead with PHP fatal error instead of content.


And feed validator was giving exact match on it:


  line 1, column 0: Undefined root element: br
  
  line 2, column 0: XML parsing error: :2:0: junk after document element


PS I am not sure which answer better to accept, this with exact solution or EAMann's with ideas and discussion? Edit: can't accept my own for two days anyway, that one it is.

What might cause "junk after document element" error?
I'm using the acronym package, and using the smaller option because that is a typographic convention.

\documentclass[a4paper]{article}
\usepackage[smaller]{acronym}
\acrodef{DLL}{Dynamically Linked Library}
\begin{document}
The plural of \ac{DLL} is \acp{DLL} but that `s' just looks way too tiny.
\end{document}


Compiled with pdflatex:


But the plural form of the acronym (\acp) appends an s but this is much to small in my opinion, and looks off.

Should I try to fix this or this typographically accepted? I was thinking about a new command \DLLs (and \DLL) which added a normal 's' but that just feels dirty.
