@dave r said:

Well, that sucks.

Yes, annoying...

@dave r said:

Do you like having the floating toolbar or is it just because you want the toolbar three tools wide?

To answer the off topic questions: no and yes. I'm used to ver.8 and a wider sticky toolbar. When evaluating ver.2015 it seems crippled in the ability to configure the toolbar, unless it's made floating, but then again not all tools can be moved to a custom floating toolbar (sandbox tools fails if I recall correctly).

Where should I report this bug anyway?

I'm unsure where the official SketchUp bug report is located... I try here as well since I got zero response on forum.sketchup.com.

When using a custom free floting toolbar the tooltip (the yellow box by the mouse pointer) sometimes displays behind the toolbar or other floating windows boxes (like Layers or Materials), see image.

Sketchup Pro 2015 v15.0.9350 64-bit (TRIAL)
Windows 7 Enterprise SP1
Two screens.

This happen randomly when moving/opening the toolbox or when moving/opening other free floting window boxes.

To replicate:
Create a new cusom free floating toolbar. Drag some tools into it so its size is at least 2x2. Hoover the mouse pointer over a tool in the box, the yellow tooltip box is then sometimes displayed under the toolbox and/or under other floating windows.

If this does not happen then try again after moving the custom toolbar or after moving/opening other free floating windows or toollboxes.

Example: