Is the drilldown broken for all your projects? You you use a proxy?

I just have one multi-module project, so I cannot answer if this is relevant to all multi-module projects.
Clearly, to me it seems to be related to the fact that more than 1 result file was evaluated (3 in this case per tool). If, e.g., just one PMD file was a result from PMD, it works fine. (I had this case before I was fixing some issues in my setup, i.e. I just had one pmd.xml result file from one of the modules. Now that I have 3 each, it doesn't work).
As said, when I open a particular module, then the drill-down works. Here (for sure) I have always just one result file.
Proxy? for hudson? no...
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Stephan

Ok, I see. This seems to be a bug.

I'm using a multi-module build with project type maven and freeestyle without any problems. Can you please check if this also happens if you run the project as freestyle project?

Which URL did you select for screenshot 2? Is it something like http://host:port/job/[jobname]/[buildnumber]/checkstyleResult/? If you change to URL http://host:port/job/[jobname]/[buildnumber]/[module]/checkstyleResult/ then everything is correctly shown?

I created a Hudson job maven for my analysis plugins: http://www.faktorzehn.org:8081/view/Hudson/job/Hudson%20Plug-ins%20%28Maven%29/1/

Maybe this helps to identify the differences between your setup and mine, so I can reproduce this bug.

Oops... it disappeared for Checkstyle and Findbugs, but something is wrong with the number of reported problems. The number of warnings is smaller than previously, mabye that's why, and it doesn't add up properly if I compare the numbers reported for the single modules?
NB: I increased the timeout on the apache config recently, as I suspected that as well might have been the reason. Can't say if this really helped.
PMD still doesn't work, and please look at the hudson.log
I will attach the huson log FYI. There are some weird error messages, e.g. java.lang.OutOfMemoryError: Java heap space
Can I increase this somewhere, if this is the reason. The number of reported warning is really high
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Stephan

hudson log from today to support error analysis, please cf. the outofmem errors...

The provided URL doesn't work...

as said in the original post, it works on a per module basis, either via the hudson provided links or via directly using the URLs as proposed.