Tomas, I doubt the issues have been fixed, because they would have been logged here if they were. That is what JIRA is for: keeping the players informed of progress on bugs and tracking work.
Go to the NVIDIA Control Panel, then to "Manage 3D Settings". Then go to "Program Settings". You add the files I mentioned above, and choose the option to use the dedicated graphics card rather than the integrated graphics. It might say something like "high performance graphics" or "NVIDIA card" or something. Sorry, I'm not near my personal computer ATM so I cannot verify what the setting says exactly.
Of course, this is only on a computer with an integrated graphics card and a dedicated graphics card, where the CPU has to determine which card to use for which application.
I'm not a pro, either. 😉 There are a bunch of threads on Minecraft forum, and some information in the wiki, too, though. You can allocate more RAM to minecraft, too, but I haven't tried that, just the NVIDIA tweaks and that worked for me, but YMMV, of course. Good luck!
DyO Kasparov, if you are using an NVIDIA card, have you set it to accelerate Minecraft? It will not do so by default. Update to Java 7, and in the NVIDIA control panel, add java.exe and javaw.exe and set them to "always accelerate" (or whatever it says there). I also added minecraft.exe to be safe, not sure if it's necessary or not. I went from 10-20 fps to over 100 doing this. Sources: http://www.minecraftforum.net/topic/1237727-fix-minecraft-lag-and-more-nvidia/
I have the same problem here https://feedback.minecraft.net/hc/en-us/community/posts/360057760912/comments/360009329772#community_comment_360009329772
what happened?