(svn r17234) [0.7] -Backport from trunk:

- Fix: Remove the (deprecated since 2006) Encoding entry from the openttd.desktop file (r17226)
- Fix: With time tables vehicles would stay in the 'loading' state after they have finished loading [FS#3129, FS#3130] (r17222)
- Fix: Do not ignore white space changes (e.g. alignment fixes) in the exporter (r17220)
- Fix: Accept monthly production values in the scenario editor [FS#2406] (r17198)
- Change: [Unix] Only use colorized error output on interactive terminals (r17227)
- Update: credits to reflect the (current) truth a bit better (r17210)

src/unix.cpp

@@ -221,8 +221,12 @@ void ShowOSErrorBox(const char *buf, bool system)
 	 * this is the native and nicest way to do this on OSX */
 	ShowMacDialog( buf, "See readme for more info\nMost likely you are missing files from the original TTD", "Quit" );
 #else
-	/* all systems, but OSX */
-	fprintf(stderr, "\033[1;31mError: %s\033[0;39m\n", buf);
+	/* All unix systems, except OSX. Only use escape codes on a TTY. */
+	if (isatty(fileno(stderr))) {
+		fprintf(stderr, "\033[1;31mError: %s\033[0;39m\n", buf);
+	} else {
+		fprintf(stderr, "Error: %s\n", buf);
+	}
 #endif
 }