ubuntuone-preferences doesn't display correct max download speed limit

Syncdaemon appears to save the result properly and return it to u1-prefs OK based on debug statements.

Steps to reproduce:
http://testcases.qa.ubuntu.com/Applications/UbuntuOne#Ubuntu%20One%20Preferences%20limit%20bandwidth%20usage

Result: Maximum download speed displays 2048 after setting it to 512

Expected result: Maximum download speed displays 512
---
Architecture: i386
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
Package: ubuntuone-client 1.2.0-0ubuntu1
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Tags: lucid
UbuntuOneOAuthLoginLog: 2010-04-20 16:50:01,138:138.221979141 ubuntuone-login Starting Ubuntu One login manager version 1.2.0
UbuntuOnePreferencesLog:
 2010-04-20 16:57:39,786 - ubuntuone-preferences - DEBUG - starting
 2010-04-20 16:57:39,873 - ubuntuone-preferences - DEBUG - got limits: dbus.Dictionary({dbus.String(u'download'): dbus.Int32(524288), dbus.String(u'upload'): dbus.Int32(262144)}, signature=dbus.Signature('si'))
 2010-04-20 16:57:39,873 - ubuntuone-preferences - DEBUG - self.dn_limit (BEFORE setting dn_spin): 524288
 2010-04-20 16:57:39,873 - ubuntuone-preferences - DEBUG - self.dn_limit (AFTER setting dn_spin): 2097152
UbuntuOneUserSyncdaemonConfig:
 [bandwidth_throttling]
 read_limit = 524288
 write_limit = 262144
 on = True
Uname: Linux 2.6.32-21-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare