diff -u gcalctool-5.28.1/debian/changelog gcalctool-5.28.1/debian/changelog
--- gcalctool-5.28.1/debian/changelog
+++ gcalctool-5.28.1/debian/changelog
@@ -1,3 +1,13 @@
+gcalctool (5.28.1-0ubuntu2) karmic; urgency=low
+
+  * debian/patches/02_negative_exponential.patch:
+    - Fix negative exponential numbers (LP: #483730)
+  * debian/patches/03_trailing_zeroes.patch:
+    - Only show and use the trailing zeroes option in scientific mode
+      (LP: #484306)
+
+ -- Robert Ancell <robert.ancell@canonical.com>  Tue, 17 Nov 2009 09:57:10 -0600
+
 gcalctool (5.28.1-0ubuntu1) karmic; urgency=low
 
   * New upstream release: (LP: #455049)
only in patch2:
unchanged:
--- gcalctool-5.28.1.orig/debian/patches/03_trailing_zeroes.patch
+++ gcalctool-5.28.1/debian/patches/03_trailing_zeroes.patch
@@ -0,0 +1,38 @@
+#
+# Description: Only show and use the trailing zeroes option in scientific mode
+# Ubuntu: https://bugs.edge.launchpad.net/gcalctool/+bug/484306
+# Upstream: https://bugzilla.gnome.org/show_bug.cgi?id=600700
+#
+diff -Nur -x '*.orig' -x '*~' gcalctool-5.28.1/src/gtk.c gcalctool-5.28.1.new/src/gtk.c
+--- gcalctool-5.28.1/src/gtk.c	2009-11-17 10:46:35.000000000 -0600
++++ gcalctool-5.28.1.new/src/gtk.c	2009-11-17 10:47:12.000000000 -0600
+@@ -1040,9 +1040,8 @@
+         if (mode != SCIENTIFIC) {
+             ui_set_numeric_mode(FIX);
+             do_button(FN_SET_ACCURACY, DEFAULT_ACCURACY);
+-        }
+-        if (mode == BASIC)
+             ui_set_show_trailing_zeroes(FALSE);
++        }
+ 
+         ui_make_registers();
+     }
+@@ -1059,7 +1058,7 @@
+     g_object_set(G_OBJECT(X.sci_panel), "visible", mode == SCIENTIFIC, NULL);
+     g_object_set(G_OBJECT(X.prog_panel), "visible", mode == PROGRAMMING, NULL);
+     g_object_set(G_OBJECT(X.bit_panel), "visible", mode == PROGRAMMING, NULL);
+-    gtk_widget_set_sensitive(GET_WIDGET("show_trailing_zeroes_menu"), mode == SCIENTIFIC || mode == PROGRAMMING);
++    gtk_widget_set_sensitive(GET_WIDGET("show_trailing_zeroes_menu"), mode == SCIENTIFIC);
+     gtk_widget_set_sensitive(GET_WIDGET("show_registers_menu"), mode != BASIC);
+     
+     /* HACK: Some horrible hack down below to keep the buttons the same size.
+@@ -1280,8 +1279,7 @@
+     gtk_widget_set_sensitive(GET_WIDGET("view_financial_menu"),  !v->error); 
+     gtk_widget_set_sensitive(GET_WIDGET("view_scientific_menu"), !v->error); 
+     gtk_widget_set_sensitive(GET_WIDGET("show_trailing_zeroes_menu"),
+-                             !v->error && (X.mode == SCIENTIFIC || 
+-                                           X.mode == PROGRAMMING)); 
++                             !v->error && X.mode == SCIENTIFIC);
+     gtk_widget_set_sensitive(GET_WIDGET("show_thousands_separator_menu"),
+                              !v->error); 
+     gtk_widget_set_sensitive(GET_WIDGET("show_registers_menu"), !v->error); 
only in patch2:
unchanged:
--- gcalctool-5.28.1.orig/debian/patches/02_negative_exponential.patch
+++ gcalctool-5.28.1/debian/patches/02_negative_exponential.patch
@@ -0,0 +1,28 @@
+#
+# Description: Fix negative exponential numbers
+# Ubuntu: https://bugs.edge.launchpad.net/ubuntu/+source/gcalctool/+bug/483730
+# Upstream: http://git.gnome.org/cgit/gcalctool/commit/?h=gnome-2-28&id=598c3472e3aeb8f9cd0b22880df64593c1c95f05
+#
+diff -Nur -x '*.orig' -x '*~' gcalctool-5.28.1/src/mp-equation-lexer.l gcalctool-5.28.1.new/src/mp-equation-lexer.l
+--- gcalctool-5.28.1/src/mp-equation-lexer.l	2009-10-12 19:28:02.000000000 -0500
++++ gcalctool-5.28.1.new/src/mp-equation-lexer.l	2009-11-17 09:58:52.000000000 -0600
+@@ -83,7 +83,7 @@
+ OCT           {ZERO}|{ONE}|{TWO}|{THREE}|{FOUR}|{FIVE}|{SIX}|{SEVEN}
+ DEC           {ZERO}|{ONE}|{TWO}|{THREE}|{FOUR}|{FIVE}|{SIX}|{SEVEN}|{EIGHT}|{NINE}
+ HEX           {DEC}|[A-F]|[a-f]
+-EXP           "e"|"e+"|"e-"|"E"|"E+"|"E-"
++EXP           "e"|"e+"|"e-"|"e−"|"E"|"E+"|"E-"|"E−"
+ SI_SUFFIX     "T"|"G"|"M"|"k"|"d"|"c"|"m"|"u"|"µ"|"n"|"p"|"f"
+ SUPER_DIGITS  "⁰"|"¹"|"²"|"³"|"⁴"|"⁵"|"⁶"|"⁷"|"⁸"|"⁹"
+ SUB_DIGITS    "₀"|"₁"|"₂"|"₃"|"₄"|"₅"|"₆"|"₇"|"₈"|"₉"
+diff -Nur -x '*.orig' -x '*~' gcalctool-5.28.1/src/unittest.c gcalctool-5.28.1.new/src/unittest.c
+--- gcalctool-5.28.1/src/unittest.c	2009-10-12 19:27:11.000000000 -0500
++++ gcalctool-5.28.1.new/src/unittest.c	2009-11-17 09:59:01.000000000 -0600
+@@ -198,6 +198,7 @@
+     test("2e3", "2000", 0);
+     test("2e+3", "2000", 0);
+     test("2e-3", "0.002", 0);
++    test("2e−3", "0.002", 0);
+     test("2×10^3", "2000", 0);
+     test("2×10^−3", "0.002", 0);
+