GWT 2.8 produces lots of warnings

[DSC-Support]

I'm using SmartGWT 5.1-p20160224/LGPL and GWT 2.8.0-Beta1 and during compilation I'm getting lots of warnings like the following ones:

[WARN] JSNI method com.smartgwt.client.widgets.Canvas.clear()V calls method java.lang.Object.getClass()Ljava/lang/Class;. Instance java.lang.Object methods should not be called on String, Array or JSO instances.
WARN] JSNI method com.smartgwt.client.core.BaseClass.wrapDestroy()V calls method java.lang.Object.getClass()Ljava/lang/Class;. Instance java.lang.Object methods should not be called on String, Array or JSO instances.
 [WARN] JSNI method com.smartgwt.client.widgets.calendar.EventCanvas.getInnerHTML()Ljava/lang/String; calls method java.lang.Object.getClass()Ljava/lang/Class;. Instance java.lang.Object methods should not be called on String, Array or JSO instances.

Should I be concerned? Any idea on how to fix them?

[Isomorphic]

These look like nonsense warnings, hopefully something that will be corrected before GWT 2.8 goes final.

[DSC-Support]

ok, thanks