Index: share/extensions/eqtexsvg.py
===================================================================
--- share/extensions/eqtexsvg.py	(revision 18424)
+++ share/extensions/eqtexsvg.py	(working copy)
@@ -114,10 +114,13 @@
             sys.exit(1)
 
         os.system('dvips -q -f -E -D 600 -y 5000 -o ' + ps_file + ' ' + dvi_file)
-        # cd to base_dir is necessary, because pstoedit
-        # writes temporary files to cwd and needs write
-        # permissions
-        os.system('cd ' + base_dir + ' ; pstoedit -f plot-svg -dt -ssp ' + ps_file + ' ' + svg_file + '  > ' + out_file + ' 2> ' + err_file)
+        # cd to base_dir is necessary, because pstoedit writes
+        # temporary files to cwd and needs write permissions
+        separator = ';'
+        if os.name == 'nt':
+            separator = '&&'
+        os.system('cd "%s" %s pstoedit -f plot-svg -dt -ssp "%s" "%s" > "%s" 2> "%s"' \
+                  % (base_dir, separator, ps_file, svg_file, out_file, err_file))
 
         # forward errors to stderr but skip pstoedit header
         if os.path.exists(err_file):