I'm working with WS scripts; more specifically with the [include] key, which when used, enables a script to call another description file (as defined in the Web Sources Framework help page) which is saved as a .inc file (whereas 'main' scripts are .src files).
Upon updating Mp3tag to v3.00d (or any time I update, for that matter) I saved my current configuration (File >Save configuration) which exports my current settings and and ws source files into a .zip archive.
When I restore the settings\sources from that archive, all the .src files are (correctly) restored, but the .inc files are not present. By checking the contents of the .zip archive, I verify that the .inc files are not present, i.e. thay have not been exported.
I believe this behaviour is incorrect, and consider it to be a bug.