Hi, thanks for looking at this issue. It sounds minor, but I use it A LOT in my game :)
Link to .capx file
Steps to reproduce:
Launch the title screen and look at the fire.
r161 > the heat effect is not displayed, and particles are cut next to it. You can see red quad corners, too.
r160 > the heat effect is displayed, and the particles are displayed on the whole screen.
If the capx ask for plug ins, just ignore it, none is used on this title screen.
Internet Explorer: untested
Operating system & service pack:
Tested on Win 7 and 8
Construct 2 version:
r160 and r161