Hello everyone,
Bamdev and I patched the geometry for positive definite matrices some time ago (sympositivedefinitefactory.m), and I was waiting for 1.0.6 to come out to release the patched version, but time goes by and still no 1.0.6 release, so I simply modified the zip file for 1.0.5 so that it now includes the correct geometry (and a little bit of version inconsistency).
If you are using Manopt, it's probably a good idea to simply re-download the zip file and replace your files with the current ones (as simple as that).
Cheers,
Nicolas