diff -u update-notifier-0.79/src/update.c update-notifier-0.79.dan/src/update.c
--- update-notifier-0.79/src/update.c	2009-06-29 05:13:27.000000000 -0700
+++ update-notifier-0.79.dan/src/update.c	2009-07-01 11:50:26.207578000 -0700
@@ -383,13 +383,17 @@
    // is to not auto launch if dpkg/apt were run manually by the
    // user
    char *logs[] = { "/var/log/dpkg.log",
+		    "/var/log/dpkg.log.1",
 		    "/var/log/apt/term.log",
+		    "/var/log/apt/term.log.1",
 		    NULL };
    for (i=0; logs[i] != NULL; i++) {
       if(g_stat(logs[i], &buf) <0) {
 	 g_warning("can't stat %s\n", logs[i]);
 	 continue;
       }
+      if (buf.st_size == 0)
+         continue;
       time_t mtime = buf.st_mtime;
       g_debug_update ("mtime from %s: %i (%s)\n", logs[i], mtime, ctime(&mtime));
       time_t bctime = buf.st_ctime;