Hi,
2 bugs I found recently.
If you right click the hotbox opens. Really annoying when trying to move the camera slightly. Instead the hotbox opens and adjusts the brush size.
Inverting the Mask never works the first time - it always clears the mask first (more often on hi-res objects)
So usually I mask, CTRL+Click, Undo, CTRL+Click. That should be fixed.
Cheers
" If you right click the hotbox opens. Really annoying when trying to move the camera slightly."
Not a bug.
I see. Do you know if there is an option to disable this?
Ah, good, you saw my post 
There are many things you can tweak, but sometimes getting to know how the software works and knowing why or how it is a benefit are better than; I don’t like this and can I disable it? 
Below my posts are some links. Two to documentation and FAQs and one to the thread with my Custom UI. It takes a while to become accustomed to ZBrush, but it’s awesome. Note first sentence on this page, IMHO#1, this page should be displayed right after activation, not buried. >> http://docs.pixologic.com/getting-started/basic-concepts/the-canvas-document/. IMHO#2 Info should be in Help format rather than massive PDF files.
Thanks Doug, I appreciate your help!
Read through the document and found out where to disable it
Preferences / Navigation / Enable Right Click Popup
I have the same functionality on space, so I decided to stick with that.
Cheers!
So the ‘problem’ is your right mouse button has a mind of it’s own? I like mine as it is due to the fact I don’t have to hit the spacebar on the keyboard to get to a bunch of the settings. I tried to expose a bunch of the useful buttons for manipulating things such as object scale and position. Check it out. Be sure to get http://www.zbrushcentral.com/showthread.php?183019-quot-Middle-Button-quot-Plug-in-for-ZBrush-4R6 too. Happy ZBrushing 