Soon after Marty Jack released LXPanel 0.5.0, I made some minor enhancements and here comes LXPanel 0.5.1.
Changes:

1. The “Run” dialog no longer hangs. Now it’s showed immediately when you open it. Available commands for auto-completion is loaded in background with multi-threading.
2. Restore the old behavior of taskbar in earlier versions: Taskbar button for the currently focused window is depressed if “Flat buttons” option is turned off.
3. Some internal changes to reduce program size.
4. Hide signal strength display in the icon of the netstatus applet if the monitored iface is not wireless.

Please give it a try!  Have fun!