diff --git a/ofdgo_editor_color.go b/ofdgo_editor_color.go
index f9654ee..f5301d0 100644
--- a/ofdgo_editor_color.go
+++ b/ofdgo_editor_color.go
@@ -233,7 +233,7 @@ func (e *Editor) Color(value *FillColor) (color.NRGBA, error) {
 			found, _ = resourceValue(e.source.reader.colorSpaceCache, id)
 		}
 		for _, resource := range e.resources {
-			if resource.space != nil && resource.space.ID == id {
+			if resource.space != nil && sameResourceID(resource.space.ID, id) {
 				found = resource.space
 				break
 			}
diff --git a/ofdgo_editor_media.go b/ofdgo_editor_media.go
index a4b053a..6922056 100644
--- a/ofdgo_editor_media.go
+++ b/ofdgo_editor_media.go
@@ -55,7 +55,7 @@ func (e *Editor) AddMedia(kind, format string, data []byte) (string, error) {
 func (e *Editor) CopyMedia(id string) (string, error) {
 	var copy editorResource
 	for _, resource := range e.resources {
-		if resource.image != nil && resource.image.ID == id {
+		if resource.image != nil && sameResourceID(resource.image.ID, id) {
 			copy = resource
 			break
 		}
diff --git a/ofdgo_editor_open.go b/ofdgo_editor_open.go
index a0d1bc5..ea309ba 100644
--- a/ofdgo_editor_open.go
+++ b/ofdgo_editor_open.go
@@ -349,7 +349,7 @@ func (e *Editor) sourceRGB() bool {
 	if e.source == nil || e.source.document.CommonData.DefaultCS == 0 {
 		return true
 	}
-	space := e.source.reader.colorSpaceCache[strconv.Itoa(e.source.document.CommonData.DefaultCS)]
+	space, _ := resourceValue(e.source.reader.colorSpaceCache, strconv.Itoa(e.source.document.CommonData.DefaultCS))
 	return space != nil && space.Type == "RGB" && space.Profile == "" && (space.BitsPerComponent == 0 || space.BitsPerComponent == 8) && len(space.Palette) == 0
 }