diff --git a/plugins/eddn.py b/plugins/eddn.py
index 497bb4f6..90f9d505 100644
--- a/plugins/eddn.py
+++ b/plugins/eddn.py
@@ -108,6 +108,11 @@ class EDDN:
     TIMEOUT = 10  # requests timeout
     MODULE_RE = re.compile(r'^Hpt_|^Int_|Armour_', re.IGNORECASE)
     CANONICALISE_RE = re.compile(r'\$(.+)_name;')
+    UNKNOWN_SCHEMA_RE = re.compile(
+        r"^FAIL: \[JsonValidationException\('Schema "
+        r"https://eddn.edcd.io/schemas/(?P<schema_name>.+)/(?P<schema_version>[0-9]+) is unknown, "
+        r"unable to validate.',\)\]$"
+    )
 
     def __init__(self, parent: tk.Tk):
         self.parent: tk.Tk = parent
@@ -212,14 +217,15 @@ class EDDN:
                 logger.trace_if('plugin.eddn', "EDDN is still objecting to empty commodities data")
                 return  # We want to silence warnings otherwise
 
-            logger.debug(
-                f'''Status from POST wasn't OK:
+            if not self.UNKNOWN_SCHEMA_RE.match(r.text):
+                logger.debug(
+                    f'''Status from POST wasn't OK:
 Status\t{r.status_code}
 URL\t{r.url}
 Headers\t{r.headers}
 Content:\n{r.text}
 Msg:\n{msg}'''
-            )
+                )
 
         r.raise_for_status()
 
@@ -281,7 +287,13 @@ Msg:\n{msg}'''
             #       in question out of replaylog, else we'll keep retrying a bad message
             #       forever.
             except requests.exceptions.HTTPError as e:
-                status['text'] = self.http_error_to_log(e)
+                if unknown_schema := self.UNKNOWN_SCHEMA_RE.match(e.response.text):
+                    logger.debug(f"EDDN doesn't (yet?) know about schema: {unknown_schema['schema_name']}"
+                                 f"/{unknown_schema['schema_version']}")
+                    #  return  # Pretend it went OK so this message isn't retried
+
+                else:
+                    status['text'] = self.http_error_to_log(e)
 
             except requests.exceptions.RequestException as e:
                 logger.debug('Failed sending', exc_info=e)
@@ -997,7 +1009,10 @@ def plugin_app(parent: tk.Tk) -> Optional[tk.Frame]:
 
 
 def tracking_ui_update() -> None:
-    """Update the Tracking UI with current data."""
+    """Update the Tracking UI with current data, if required."""
+    if not config.eddn_tracking_ui:
+        return
+
     this.ui_j_body_name['text'] = '≪None≫'
     if this.body_name is not None:
         this.ui_j_body_name['text'] = this.body_name