Index: uformat.c
===================================================================
--- uformat.c.orig	2009-10-22 17:55:13.000000000 +0200
+++ uformat.c	2009-10-22 18:32:40.674592919 +0200
@@ -564,10 +564,12 @@ int uformat(BW *bw)
 		if (!bw->o.autoindent) {
 			/* Don't indent second line of single-line paragraphs if autoindent is off */
 			int x = zlen(indents);
+			int start = x;
 			while (x && (indents[x - 1] == ' ' || indents[x - 1] == '\t'))
 				indents[--x] = 0;
 			if (x) {
-				indents[x++] = ' ';
+				if(x < start)
+					indents[x++] = ' ';
 				indents[x] = 0;
 			}
 			indent = txtwidth1(bw->o.charmap, bw->o.tab, indents, x);