The [[ikiwiki/directive/img]] directive emits an extra double quote if alt=x is
specified (as is necessary for valid HTML). This results in malformed HTML,
like this:

    <img src="U" width="W" height="H"" alt="A" />
                                     ^

This [[patch]] is available from the img-bugfix branch in my git repository:

    commit a648c439f3467571374daf597e9b3a659ea2008f
    Author: Simon McVittie <smcv@ http://smcv.pseudorandom.co.uk/>
    Date:   2009-06-16 17:15:06 +0100
    
        img plugin: do not emit a redundant double-quote before alt attribute
    
    diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
    index a697fea..a186abd 100644
    --- a/IkiWiki/Plugin/img.pm
    +++ b/IkiWiki/Plugin/img.pm
    @@ -121,7 +121,7 @@ sub preprocess (@) {
            my $imgtag='<img src="'.$imgurl.
                    '" width="'.$im->Get("width").
                    '" height="'.$im->Get("height").'"'.
    -               (exists $params{alt} ? '" alt="'.$params{alt}.'"' : '').
    +               (exists $params{alt} ? ' alt="'.$params{alt}.'"' : '').
                    (exists $params{title} ? ' title="'.$params{title}.'"' : '').
                    (exists $params{class} ? ' class="'.$params{class}.'"' : '').
                    (exists $params{id} ? ' id="'.$params{id}.'"' : '').

--[[smcv]]

[[done]] --[[Joey]]