I have experienced this issue almost as long as I have played minecraft. I started in 1.6.4 and I think those worlds are gone now but, i have some worlds from very early 1.7.2 that had horrid chunk glitch issues as they updated. The center of the castle in my avatar pic was regenerated to original chunk. I have also noticed some odd chunk overrides where the natural chunk is replaced by a weird ass biome. For instance, there is a single jungle biome that almost killed me in one of my 1.7 based survival worlds when i was walking in extreme hills. There is also some odd chunk borders in some areas where it looks like one stlye of chunk stopped generating and a new style of world generation began. there is a definate MASSIVE ring around certian arras of my 1.7 worlds where the chunks just decided to start making new biomes.
Donald B
I have experienced this issue almost as long as I have played minecraft. I started in 1.6.4 and I think those worlds are gone now but, i have some worlds from very early 1.7.2 that had horrid chunk glitch issues as they updated. The center of the castle in my avatar pic was regenerated to original chunk. I have also noticed some odd chunk overrides where the natural chunk is replaced by a weird ass biome. For instance, there is a single jungle biome that almost killed me in one of my 1.7 based survival worlds when i was walking in extreme hills. There is also some odd chunk borders in some areas where it looks like one stlye of chunk stopped generating and a new style of world generation began. there is a definate MASSIVE ring around certian arras of my 1.7 worlds where the chunks just decided to start making new biomes.