The views contain a lot of errors.

There are two kinds of errors that may appear in the Log Analyzer. The first kind are HTML errors. These errors occur when users request pages that aren't there, mis-typed URLs, etc. These errors will have two red Xs beside them in the views. These may be caused by broken links on your site and should be investigated. They may also just be the user's fault and can be ignored.
The second type of error that can occur is errors in analysis. These occur when the Log Analyzer cannot open the database or view that was hit, or some other situation that prevents the Analyzer from properly identifying the hit. These types of errors have one red X beside them in the views. They usually contain an explanation of what is wrong in the Comments field near the bottom of the hit document. If you are getting these types of errors, check the Comments field for more information on what to do about the error.