Crash on first run in Android 2.3

[devrandom]

Caused by: java.lang.RuntimeException: Binary XML file line 26: You must supply a layout_width attribute.
E/AndroidRuntime( 7744):    at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491)
E/AndroidRuntime( 7744):    at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:3598)
E/AndroidRuntime( 7744):    at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:3678)
E/AndroidRuntime( 7744):    at android.widget.RelativeLayout$LayoutParams.<init>(RelativeLayout.java:1050)
E/AndroidRuntime( 7744):    at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:920)
E/AndroidRuntime( 7744):    at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:68)
E/AndroidRuntime( 7744):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:625)
E/AndroidRuntime( 7744):    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
E/AndroidRuntime( 7744):    at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
E/AndroidRuntime( 7744):    at org.eclair.parandroid.sms.ui.ConversationList.onCreate(ConversationList.java:140)
E/AndroidRuntime( 7744):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime( 7744):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586)
E/AndroidRuntime( 7744):    ... 11 more
W/ActivityManager(  106):   Force finishing activity org.eclair.parandroid.sms/.ui.ConversationList