There are some know unsorted issue is Splunk 4.3.1 as follows "SPL-48455" related to PDF Report Server. Is this issue fix in latest splunk version?
or do we still have some known issue with PDF Report Server 1.3 on Splunk5.0
A quick search of the docs page reveals that it was fixed in 4.3.2.
If you ever want to know about known issues or fixes per version always have a look at the release notes first.