diff --git a/semantica/explorer/routes/export_import.py b/semantica/explorer/routes/export_import.py
index 587afa56..8c7c2e56 100644
--- a/semantica/explorer/routes/export_import.py
+++ b/semantica/explorer/routes/export_import.py
@@ -5,7 +5,7 @@ Export & import routes.
 import asyncio
 import io
 import json
-import json
+import logging
 import os
 import tempfile
 from typing import Optional
@@ -13,6 +13,8 @@ from typing import Optional
 from fastapi import APIRouter, Depends, File, UploadFile
 from fastapi.responses import Response
 
+logger = logging.getLogger(__name__)
+
 from ..dependencies import get_session, get_ws_manager
 from ..schemas import ExportRequest
 from ..session import GraphSession
@@ -229,7 +231,8 @@ async def import_file(
                 "detail": f"File type not supported yet: {filename}",
             }
     except Exception as exc:
-        result = {"status": "error", "detail": str(exc)}
+        logger.exception("Import failed")
+        result = {"status": "error", "detail": "An internal error occurred during import"}
 
     await ws.broadcast("import_completed", result)
     return result
diff --git a/semantica/ingest/email_ingestor.py b/semantica/ingest/email_ingestor.py
index b626abfd..0f16d9df 100644
--- a/semantica/ingest/email_ingestor.py
+++ b/semantica/ingest/email_ingestor.py
@@ -392,7 +392,7 @@ class EmailParser:
         # Extract URLs from text using regex
         import re
 
-        url_pattern = r"http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+"
+        url_pattern = r"https?://(?:[a-zA-Z0-9]|[$\-_.&+!*(),]|(?:%[0-9a-fA-F]{2}))+"
         text_links = re.findall(url_pattern, email_content)
         links.extend(text_links)
 
diff --git a/semantica/normalize/text_cleaner.py b/semantica/normalize/text_cleaner.py
index f97ceb45..a6b5f93c 100644
--- a/semantica/normalize/text_cleaner.py
+++ b/semantica/normalize/text_cleaner.py
@@ -302,10 +302,10 @@ class TextCleaner:
 
         # Remove potential script tags
         text = re.sub(
-            r"<script[^>]*>.*?</script>", "", text, flags=re.IGNORECASE | re.DOTALL
+            r"<script[^>]*>.*?</script(?:\s[^>]*)?>", "", text, flags=re.IGNORECASE | re.DOTALL
         )
         text = re.sub(
-            r"<iframe[^>]*>.*?</iframe>", "", text, flags=re.IGNORECASE | re.DOTALL
+            r"<iframe[^>]*>.*?</iframe(?:\s[^>]*)?>", "", text, flags=re.IGNORECASE | re.DOTALL
         )
 
         # Remove javascript: URLs
diff --git a/semantica/ontology/naming_conventions.py b/semantica/ontology/naming_conventions.py
index f3ebd01a..2d4e0e39 100644
--- a/semantica/ontology/naming_conventions.py
+++ b/semantica/ontology/naming_conventions.py
@@ -350,7 +350,7 @@ class NamingConventions:
     def _is_noun_phrase(self, name: str) -> bool:
         """Check if name is a noun phrase (basic heuristic)."""
         # Basic heuristic: PascalCase words are typically nouns
-        return bool(re.match(r"^[A-Z][a-zA-Z0-9]*([A-Z][a-zA-Z0-9]*)*$", name))
+        return bool(re.match(r"^[A-Z][a-zA-Z0-9]*(?:[A-Z][a-zA-Z0-9]*)*$", name))
 
     def _is_verb_phrase(self, name: str) -> bool:
         """Check if name is a verb phrase (basic heuristic)."""