Class Cast Exception on Blog versioning

When version conflicts have to be handled for blog posts, the following exception is thrown:

Cause:
java.lang.ClassCastException: com.atlassian.confluence.pages.BlogPost
at com.atlassian.confluence.pages.AbstractPage.getNumberedVersion(AbstractPage.java:119)

Stack Trace: [hide]

java.lang.ClassCastException: com.atlassian.confluence.pages.BlogPost
at com.atlassian.confluence.pages.AbstractPage.getNumberedVersion(AbstractPage.java:119)
at com.atlassian.confluence.pages.actions.AbstractEditPageAction.handleVersionConflict(AbstractEditPageAction.java:207)
at com.atlassian.confluence.pages.actions.AbstractEditPageAction.doEdit(AbstractEditPageAction.java:137)
at com.atlassian.confluence.pages.actions.EditBlogPostAction.doEdit(EditBlogPostAction.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)