When a KB article is created with a title containing an apostrophe ('), "Show More" link will not be functional.
A good example is a KB article with title containing "User's Guide".
This issue is fixed in Workflow 7.6 and ServiceDesk 7.6.
As a workaround for this problem, please avoid using apostrophes in the article title.
ServiceDesk 7.5 MP1
ServiceDesk 7.5 SP1