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This is the seed, i did it in amplified, but thats does not matter.And this seed has an another thing, there is a snowy biome next to this mesa,and they bordered by a thin ocean biome.You spawn in the place where these things happen.
That wasn't my basic problem, because thats easy to fix that was my reason to try load it to 1.6.4.I copied my worlds between directories so many times, i may have it in an another place.But some kind of warning could be showed in the launcher.like :" Back up your worlds before entering the new version. "
The particles are not my problem, My problem is that half of my map got regenerated...
I expected this too.
Happened while having advanced opengl turned off, changing mipmap levels causes the game to freeze then the mousclick is not being released from the bar.
Advanced opengl not shows up on ATI Radeon HD 4600 Series video card.