Found 2 bugs that I think are worth a look.
I cannot open the mIRC editor with my RIGHT ALT key, ALT+R. However, it will open with my left ALT key. I have a DYNEX keyboard, not sure if it is an issue with the keyboard or windows driver that I am using.
The next bug I found was when closing mIRC and having the confirmation box enabled. If I click the "X" to close mIRC and my editor window is open, the editor will close, even if I choose not to close mIRC. This happens both if the editor is windowed in mIRC or if it is shown on the desktop.
These are not all that big, but they are still actions unexpected, nonetheless