What are metadb_handle leaks?
metadb_handles are resources used in the metadata management in foobar2000. A leak indicates that a component does not release them (in time). The overall effect of such a leak is relatively harmless. Nevertheless, this is a programming error and foobar2000 detects and reports it to the user. Unfortunately, it is not possible for foobar2000 to detect which component caused the leak.