Error Loading Tracklog

I have seen another post to this effect, but in that case, timing info was missing from the file.

I am running LR4 on Lion 10.7.3.  I am able to successfully geotag my photos using a gpx file from my Holux M241 and Jeffrey Friedl's Geotagging LR plugin.  When I try to do it using the same gpx file via the new load tracklog feature in LR4, I just get the non-descript error "Error Loading Tracklog".

The GPX file can be found here:

http://dl.dropbox.com/u/2703272/Holux_M-241_Start_20120317-144038_Fini sh_20120317-153038.gpx

Any ideas what is wrong?  Is there a error log somewhere that would provide more helpful information?

Thanks,

Matti