See http://redmine.kokuaviewer.org/issues/582
This happened only on opensim. The fixed was made
basically by MichelleZ. It doesn't harm anything, so
even though it appears to never happen on Agni
and it is unknown what bug is causing it, it make the
viewer resilient just-in-case...
Need to test:
localassetbrowser
preview related floaters
hgfloatertexteditor
maps
media textures! Currently very hacky
web browser
alpha masks on avatars
bumpmaps
Are all sky components appearing?
LLViewerDynamicTexture (texture baking, browser, animated textures, anim previews, etc)
Snapshot related features
Customize avatar
vfs floater
UI textures in general
Texture priority issues