+
+[[madduck]]: I traced this down to `htmlscrubber`. If disabled, it works. If
+enabled, then `$safe_url_regexp` determines the URL unsafe because of the
+colon and hence removes the `src` attribute.
+
+Digging into this, I find that [[!rfc 3986]] pretty much discourages colons in
+filenames:
+
+> A path segment that contains a colon character (e.g., "this:that") cannot be
+> used as the first segment of a relative-path reference, as it would be
+> mistaken for a scheme name. Such a segment must be preceded by
+> a dot-segment (e.g., "./this:that") to make a relative- path reference.
+
+The solution seems not to use colons.
+
+In any case, `htmlscrubber` should get a new regexp, courtesy of dato:
+`[^:]+($|\/)`. I have tested and verified this.
+
+[Commit/patch
+be0b4f60](http://git.madduck.net/v/code/ikiwiki.git?a=commit;h=be0b4f603f918444b906e42825908ddac78b7073) fixes this.
+
+
+**July 21 2008:** I update this bug report as it still seems to be an issue: E.g. when creating a subpage whose name contains
+a colon by inserting an appropriate wikilink in the parent page: the new page can be created using that link, but afterwards
+there won't be a link to this page. Like madduck said above it seems to be htmlscrubber removing this link. However everything
+works fine if the same page is being linked to from another subpage because in that case the resulting link starts with `../`.
+
+At the moment I see two possible solutions:
+
+1. let all relative links at least start with `./`. I haven't tested this.
+
+2. Escape the colon in page titles. I created the following patch which worked for me:
+
+ --- IkiWiki.pm.2.53-save 2008-07-08 15:56:38.000000000 +0200
+ +++ IkiWiki.pm 2008-07-21 20:41:35.000000000 +0200
+ @@ -477,13 +477,13 @@
+
+ sub titlepage ($) { #{{{
+ my $title=shift;
+ - $title=~s/([^-[:alnum:]:+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+ + $title=~s/([^-[:alnum:]+\/.])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+ return $title;
+ } #}}}
+
+ sub linkpage ($) { #{{{
+ my $link=shift;
+ - $link=~s/([^-[:alnum:]:+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+ + $link=~s/([^-[:alnum:]+\/._])/$1 eq ' ' ? '_' : "__".ord($1)."__"/eg;
+ return $link;
+ } #}}}
+
+What do you think about that? Does the patch have any side-effects I didn't see?
+
+> What version of ikiwiki are you seeing it with? I fixed another
+> colon-bug in version 2.53; you'd need to rebuild any affected wikis to
+> get the fix. The relevant code is in `beautify_urlpath`, where it adds
+> "./" in front of every relative url. An example of it working in this
+> very wiki is a link to [[colon:problem]] --[[Joey]]