I am currently running a bukkit server 1.3.1, the only plugin I have is voxelsniper. the problem is that while I was building off the side of a floating island I created it stopped letting me go out any further, the block in my hand darkened exactly like I was up at the height limit except I was building horizontally instead of vertically. anyone know what is causing this problem? let me know if you need additional information
not the world border, I thought about the loading thing and it does seem to change locations slightly when I go far enough away and come back. after some more investigating it seems to be either a large cube or several smaller cubes starting at y= 260 all the way down. also it is above an area without ground below it if that helps any.
could the lighting have stopped me being able to place blocks? it's not just that it darkened, it also wouldn't let me place any more blocks.