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Redefining the "snugshade" environment to use code similar to that used in the "shaded" environment definition makes the problem go away, without affecting the snugshade output appearance. It is not obvious why the package defines the two environments in different ways.

I defined a custom float environment to put a grey background behind the caption, using the framed package. Like this:

% grey background custom floats with rule
\definecolor{shadecolor}{gray}{.8}
\renewcommand\fs@plaintop{\def\@fs@cfont{\bfseries}%
\def\@fs@pre{\begin{snugshade}}%
\def\@fs@mid ...

Depending on your requirements, you may be able to use PmWiki + Wikipublisher -- wiki software with a plug-in and server that supports TeX equation commands, and wiki markup for citations and bibliographies (among other things). Without knowing more about the requirement, it's hard to tell whether a ...

I have a local command \citesic that provides a link from a citation to its labelled reference, defined as follows:

\newcommand\citesic[2]{\hyperlink{#2}{#1}}

#2 is the label and #1 is the link text.

The problem is that if we configure hyperref so that colorlinks=true, these links come out in ...