diff --git a/kernel/arch/i386/system.c b/kernel/arch/i386/system.c
index aa0aef648..00e6bde35 100644
--- a/kernel/arch/i386/system.c
+++ b/kernel/arch/i386/system.c
@@ -60,7 +60,7 @@ PUBLIC void arch_shutdown(int how)
 					c != '\'' && c != '"' &&
 					c != '\\' && c != ';') {
 					mybuffer[dest] = c;
-				} else	mybuffer[dest] = '|';
+				} else	mybuffer[dest] = ' ';
 
 				DECSOURCE;
 				dest--;
diff --git a/kernel/system.c b/kernel/system.c
index e39210757..5f8a32710 100755
--- a/kernel/system.c
+++ b/kernel/system.c
@@ -78,13 +78,6 @@ PUBLIC void sys_task()
   while (TRUE) {
       struct proc *restarting;
 
-#if 0
-if(!(n++ % 100000)) {
-	int i;
-	kprintf("switch %8d reload %8d\n", cr3switch, cr3reload);
-}
-#endif
-
       restarting = vmrestart_check(&m);
       softnotify_check();
 	if(softnotify)
diff --git a/servers/mfs/cache.c b/servers/mfs/cache.c
index ed04fc364..c75f2321a 100644
--- a/servers/mfs/cache.c
+++ b/servers/mfs/cache.c
@@ -65,6 +65,7 @@ int only_search;		/* if NO_READ, don't read, else act normal */
 			/* Block needed has been found. */
 			if (bp->b_count == 0) rm_lru(bp);
 			bp->b_count++;	/* record that block is in use */
+			ASSERT(bp->b_bytes == fs_block_size);
 			ASSERT(bp->b_dev == dev);
 			ASSERT(bp->b_dev != NO_DEV);
 			ASSERT(bp->bp);
@@ -112,9 +113,8 @@ int only_search;		/* if NO_READ, don't read, else act normal */
   if(bp->b_bytes < fs_block_size) {
 	static int n = 0;
 	phys_bytes ph;
-	if(bp->b_bytes > 0)
-		printf("MFS: WARNING: throwing away %d bytes!\n",
-			bp->b_bytes);
+	ASSERT(!bp->bp);
+	ASSERT(bp->b_bytes == 0);
 	if(!(bp->bp = alloc_contig(fs_block_size, 0, &ph)))
 		panic(__FILE__,"couldn't allocate FS buffer", n);
   	bp->b_bytes = fs_block_size;
diff --git a/tools/release.sh b/tools/release.sh
index 1b61d30db..bdd96c72e 100755
--- a/tools/release.sh
+++ b/tools/release.sh
@@ -132,7 +132,7 @@ do
 	esac
 done
 
-USRMB=400
+USRMB=150
 
 USRBLOCKS="`expr $USRMB \* 1024 \* 1024 / $BS`"
 USRSECTS="`expr $USRMB \* 1024 \* 2`"