Issue Loading XSLT

In our application, we have a main page where the user sees the current status of his/her documents in the workflow. We are using XML views with XSLT to render the information and give the user the sorting availability. On development everything works without any problem, but in production we are getting some random responses. The user gets IE or Firefox errors that said that the XSLT file is wrong. We enable the domlog.nsf and it show that the XSLT was retrieve without problem, but for the browser the XSLT has issues. This is not happening all the time, and has been hard to determine if it is a Domino Issue or a Network issue.

Has somebody else experience this kind of problems? How we can debug better the response from the server to the browser?