I tested these changes for so long I actually forgot what they were, but they seem to work, so committing.

src/cthulhu/ax_hypertext.py

@@ -204,10 +204,21 @@ class AXHypertext:
 
     @staticmethod
     def find_child_at_offset(obj: Atspi.Accessible, offset: int) -> Optional[Atspi.Accessible]:
-        """Attempts to correct for off-by-one brokenness in implementations"""
+        """Returns the child at offset, correcting for broken hypertext offset mappings."""
 
         if child := AXHypertext.get_child_at_offset(obj, offset):
-            return child
+            offset_in_parent = AXHypertext.get_character_offset_in_parent(child)
+            if offset_in_parent == offset:
+                return child
+
+            tokens = [
+                f"AXHypertext: Child at offset {offset} in",
+                obj,
+                "is",
+                child,
+                f"but reports offset {offset_in_parent}",
+            ]
+            debug.print_tokens(debug.LEVEL_INFO, tokens, True)
 
         if child_before := AXHypertext.get_child_at_offset(obj, offset - 1):
             offset_in_parent = AXHypertext.get_character_offset_in_parent(child_before)
@@ -225,6 +236,30 @@ class AXHypertext:
                 debug.print_tokens(debug.LEVEL_INFO, tokens, True)
                 return child_after
 
+        for i in range(AXHypertext._get_link_count(obj)):
+            link = AXHypertext._get_link_at_index(obj, i)
+            if link is None or AXHypertext.get_link_start_offset(link) != offset:
+                continue
+
+            try:
+                child = Atspi.Hyperlink.get_object(link, 0)
+            except GLib.GError as error:
+                msg = f"AXHypertext: Exception in find_child_at_offset: {error}"
+                debug.print_message(debug.LEVEL_INFO, msg, True)
+                continue
+
+            if child is None:
+                continue
+
+            tokens = [
+                f"AXHypertext: Child at offset {offset} in",
+                obj,
+                "found via link enumeration:",
+                child,
+            ]
+            debug.print_tokens(debug.LEVEL_INFO, tokens, True)
+            return child
+
         return None
 
     @staticmethod