Hi,
I am also having the same glitch issue with the Invoice description line and have to use the cursor to get around the description/amount line when adding and changing information, and also cannot cut and paste information into the description line.
This starting happening about 3 weeks ago (start of August). I have tried using 2 other computers with different Window versions, but have the same problem.
From the discussion here it seems it might be using myob on Firefox that has the glitch, but I want to stay using Firefox.
Hopefully myob will look into this.