This issue pertains to version 1.1-dev Build:#52 Jun 08, 2004.

With prior releases of Confluence it used to be possible to link to pages with apostrophes in the title. Example (taken from http://confluence.atlassian.com/display/TEST/Apostrophe%27s+page):

[Link to self|Apostrophe's page]

This isn't possible anymore. With version 1.1 this is rendered as:

<span class="error">[Link to self|Apostrophe's page]</span>

with results in the entered text with a redish background color. Escaping the apostrophe with a leading backslash doesn't seem to help either.

If this new behaviour is intentional it should be documented in the notation guide. But I'm hoping it is a bug