Attempt to fix the negative sign persistance issue #138, although I cannot reproduce it so lets hope for the best.

core/res/layout/dialog_transferrates.xml

@@ -43,8 +43,7 @@
 			android:layout_weight="1"
 			android:gravity="right"
 			android:singleLine="true"
-			android:text="-"
-			tools:ignore="HardcodedText" />
+			android:text="@string/status_maxspeed_novalue" />
 
 		<TextView
 			android:layout_width="wrap_content"
@@ -188,8 +187,7 @@
 			android:layout_weight="1"
 			android:gravity="right"
 			android:singleLine="true"
-			android:text="-"
-			tools:ignore="HardcodedText" />
+			android:text="@string/status_maxspeed_novalue" />
 
 		<TextView
 			android:layout_width="wrap_content"

core/res/values/strings.xml

@@ -127,6 +127,7 @@
 	<string name="status_maxspeed_up">MAX UPLOAD</string>
 	<string name="status_maxspeed_unit">KB/S</string>
 	<string name="status_maxspeed_reset">Reset</string>
+	<string name="status_maxspeed_novalue" translatable="false">-</string>
 	<string name="status_update">Update</string>
 	<plurals name="status_service_added">
 		<item quantity="one">New torrent added</item>

core/src/org/transdroid/core/gui/navigation/SetTransferRatesDialog.java

@@ -116,7 +116,7 @@ public class SetTransferRatesDialog extends DialogFragment {
 			// Append the text contents of the button itself as text to the current number (as reference in the view's
 			// tag)
 			TextView numberView = (TextView) v.getTag();
-			if (numberView.getText().equals("-"))
+			if (numberView.getText().toString().equals(getString(R.string.status_maxspeed_novalue)))
 				numberView.setText("");
 			numberView.setText(numberView.getText().toString() + ((Button) v).getText().toString());
 		}