I see.. I re-created the same exact thing in creative. No issues. Not sure what's up with the bugged blocks here.
THIS IS NOT RESOLVED. Please unmark it as such.
They were flowing on top of the sunken drawbridge before. Now they are bugged. I've tried breaking the blocks, replacing them, but still the lava will not flow towards those blocks.
It's not just the natural flow of lava. Please reference the screenshots.
Yes there are. I have redstone wiring and repeaters on the sides of the pistons underneath.
Shows actuated pistons and then the rift. The non-flowing lava stays that way indefinitely.
Confirming for 1.6.2 Vanilla SMP and Gigabit LAN games. Has very little to do with hardware. (Running on a RAMdisk, with 4gb of allotted Ram, still receiving lag).