diff --git a/admin/sync/exercice_hints.go b/admin/sync/exercice_hints.go
index 3afa1222..32ea9b7d 100644
--- a/admin/sync/exercice_hints.go
+++ b/admin/sync/exercice_hints.go
@@ -28,6 +28,8 @@ func SyncExerciceHints(i Importer, exercice fic.Exercice) (errs []string) {
 		for n, hint := range params.Hints {
 			if hint.Title != "" {
 				hint.Title = fmt.Sprintf("Astuce #%d", n+1)
+			} else {
+				hint.Title = fixnbsp(hint.Title)
 			}
 			if hint.Cost <= 0 {
 				hint.Cost = exercice.Gain / 4
@@ -72,7 +74,7 @@ func SyncExerciceHints(i Importer, exercice fic.Exercice) (errs []string) {
 			} else if hint.Content == "" {
 				errs = append(errs, fmt.Sprintf("%q: challenge.txt: hint %s (%d): content and filename can't be empty at the same time", path.Base(exercice.Path), hint.Title, n+1))
 				continue
-			} else if hint.Content, err = ProcessMarkdown(i, hint.Content, exercice.Path); err != nil{
+			} else if hint.Content, err = ProcessMarkdown(i, fixnbsp(hint.Content), exercice.Path); err != nil{
 				errs = append(errs, fmt.Sprintf("%q: challenge.txt: hint %s (%d): error during markdown formating: %s", path.Base(exercice.Path), hint.Title, n+1, err))
 			}
 
diff --git a/admin/sync/exercices.go b/admin/sync/exercices.go
index b8a484fd..fb491cc9 100644
--- a/admin/sync/exercices.go
+++ b/admin/sync/exercices.go
@@ -11,6 +11,10 @@ import (
 	"gopkg.in/russross/blackfriday.v2"
 )
 
+func fixnbsp(s string) string {
+	return strings.Replace(strings.Replace(strings.Replace(s, " ?", " ?", -1), " !", " !", -1), " :", " :", -1)
+}
+
 // getExercices returns all exercice directories existing in a given theme, considering the given Importer.
 func getExercices(i Importer, theme fic.Theme) ([]string, error) {
 	var exercices []string
@@ -90,12 +94,14 @@ func SyncExercice(i Importer, theme fic.Theme, epath string, dmap *map[int64]fic
 	}
 
 	e.URLId = fic.ToURLid(e.Title)
+	e.Title = fixnbsp(e.Title)
 
 	// Texts to format using Markdown
 	e.Overview, err = getFileContent(i, path.Join(epath, "overview.txt"))
 	if err != nil {
 		errs = append(errs, fmt.Sprintf("%q: overview.txt: %s", edir, err))
 	} else {
+		e.Overview = fixnbsp(e.Overview)
 		e.Headline = string(blackfriday.Run([]byte(strings.Split(e.Overview, "\n")[0])))
 		if e.Overview, err = ProcessMarkdown(i, e.Overview, epath); err != nil {
 			errs = append(errs, fmt.Sprintf("%q: overview.txt: an error occurs during markdown formating: %s", edir, err))
@@ -106,7 +112,7 @@ func SyncExercice(i Importer, theme fic.Theme, epath string, dmap *map[int64]fic
 	if err != nil {
 		errs = append(errs, fmt.Sprintf("%q: statement.txt: %s", edir, err))
 	} else {
-		if e.Statement, err = ProcessMarkdown(i, e.Statement, epath); err != nil {
+		if e.Statement, err = ProcessMarkdown(i, fixnbsp(e.Statement), epath); err != nil {
 			errs = append(errs, fmt.Sprintf("%q: statement.txt: an error occurs during markdown formating: %s", edir, err))
 		}
 	}
diff --git a/admin/sync/themes.go b/admin/sync/themes.go
index f131f972..c511cdd0 100644
--- a/admin/sync/themes.go
+++ b/admin/sync/themes.go
@@ -71,9 +71,9 @@ func SyncThemes(i Importer) []string {
 
 			// Extract theme's label
 			if f := strings.Index(tdir, "-"); f >= 0 {
-				tname = tdir[f+1:]
+				tname = fixnbsp(tdir[f+1:])
 			} else {
-				tname = tdir
+				tname = fixnbsp(tdir)
 			}
 
 			if authors, err = getAuthors(i, tdir); err != nil {
@@ -83,7 +83,7 @@ func SyncThemes(i Importer) []string {
 				errs = append(errs, fmt.Sprintf("%q: unable to get theme's overview: %s", tname, err))
 			} else {
 				// Split headline from intro
-				ovrvw := strings.Split(intro, "\n")
+				ovrvw := strings.Split(fixnbsp(intro), "\n")
 				headline = ovrvw[0]
 				if len(ovrvw) > 1 {
 					intro = strings.Join(ovrvw[1:], "\n")