Attempts to add SeaMonkey calendar to IceApe (through addons.mozilla.org) does not allow install stating that Lightning 1.8 is not compatible.
CC: (none) => cjw, wrw105
Going back, it looks like the problem is that we're a bit behind on IceApe. Lightning 1.8 only works with the 2.13 series of SeaMonkey, and we're currently in the 2.12 series. I've installed Lightning 1.7 which works. Marking the bug as resolved.
Status: NEW => RESOLVEDResolution: (none) => FIXED