Hi Andy,
I am on miui 1.9.16 and using your 5x4 w/o dock launcher mod...I have been getting back to back launcher fc's whenever I download apps from the market and have to flash my nandroid to get it to stop. I notice it starting with 1.9.9...any chance on getting the launcher mod compatible...
I downloaded the mod onto my sd, booted into recovery, wipe cache and dalvik and flashed the 1.9.2 5x4 launcher zip, then just rebooted. I didn't get any launcher fc.
Make sure there are no apps in your dock.
I ran into the same and just flashed the dock mod ...running 5x4 w/o dock. I forgot about that glitch.
I personally like it w/o the dock. Here's the link to this mod : http://forums.miuiandroid.com/showthread.php?9029-Launcher-MOD
I am using this mod (v2) on my nexus s 4g with miui 1.9.9 and not having any issues with it. Take that back...battery icon doesn't show even when graphic or percentage is selected. Top bar works.