>You're sure that's the SPML that's generating your links? I use the >exact same code in topic.spml here.
That is the only link-generating code on the page. Outside of a few aesthetic alterations, the topic.spml file is exactly the same as the one that came with TF Server. Again, this code works just fine except on conferences that are more than one directory deep. I'm wondering if part of the problem might be that the SPML code includes both the PARENT_LOCATION and DIRNAME variables, which results in the redundancy in the URL when a conference more than one directory down is accessed. If any of this is unclear, please let me know what I can do to clarify it.
