I am having a similar problem after upgrading to Joomla 3.4.1 with JSiteMap Pro 3.2. The raw and formatted versions of XML sitemap are not being displayed properly - i.e. they are not being formatted. I tried the solution of changing Configuration > Advanced Settings > Resources Limit Management to Server Mode. This does not work until I clear the system cache. I then get properly formatted sitemaps. But the next time I try to display a sitemap, it is unformatted again - until I clear the system cache again. Is this a little bug in JSitemap Pro, or is there a way to configure it so that this error does not happen?

Paul