I found a bug when using advanced filters and traverse multiple objects.
Here is the use case:
organisation has a one-to-many to organisation_address
organisation_address has a many-to-one to lookup_country.
I now want to filter for all organisations that have an address in a specified country.
The filter builder lets me easily do this. However once completed I get a JSON parsing error and it does not work.
Great, thanks for the report. This has been fixed in the latest 10.8.0 builds.