[Hexxit crashes upon entering a world]

Your Java is out of date, update to java 1.7 version 45 and let us know if issue persists.

[Keeps on crashing when joining server]

Well, the log looks like its trying to render an item that doesn't exist...

However, try uninstalling ALL versions of java (You'll have two, if you think you've got 64 and minecraft see's 32) and installing only 64 bit directly, see if that helps at all.

[Forge Mod Loader has found ID mismatches - ID from Mod ExtrabiomsXL is missing]

Well an ID mismatch isn't usually related to the computer, but I wouldn't recommend trying to play and run an modded server off a machine that is that weak.

[Mods dont load always say "Loading.."]

2013/12/26 12:42:26 [iNFO] Launcher Build: 0

You sir, are some sort of wizard. Just, delete and reinstall technic, and don't follow TwoTail's advice unless you absolutely refuse to listen to anybody else.

[Upside-down and Backwards! when I open any of the mod packs the screen is Upside-down and backwards.]

Does going into fullscreen fix the issue? F11, you may need to hold the Fn and Alt keys to make it properly go full screen.

[modpacks wont download]

Update to the newest launcher version, you are 60 versions behind and we have had some significant changes. If issue persists, disable your antivirus.

[Not fully starting up]

Disable your antivirus and see if issue persists.

[Votlz server error]

Voltz has its own seperate support forum due to its particular and unique nature, try asking there.

[i will make a server ?]

Make sure you run it with full admin privilege or it will not work, and the ducks will continue to rampage through your system unaffected.

[Help PLEASE]

Please fill out a full bug report in the proper section of the forum for further assistance.

[Dimensional Doors no longer work]

Well I would recommend asking on the Dimensional Doors MCF thread, assuming thats where the dev watches, but to take a guess, I'd say that whatever was causing serious issues in the world probably ate those other dimensions from the server files. Either that or you mangled the server config and somehow that's messed this up.

[Launcher]

Well, I'd love to help you, but much like your knowledge of your java version, "idk" if I'd like to.

""

No but seriously, fill out the entire bug report form properly, and then we can work to resolve the issue.

[PLEZ HELP ME]

Well, it is rare for us to be graced by such a low effort post as this.

Did you try connecting to the internet?

[ma crekd takit no workz]

I cannot believe I missed something just... This beautiful. I'm building a monument to this 'man' at this very moment in my world.

[What happened to mocreatures and xtrabiomes in Tekkit?]

Mocreatures and extrabiomes were in different versions of the pack, and did not end up being carried over to the 1.5.2 version of the modpack.

[Modpack error in opening zip file (PLZ HELP)w]

i got a error:error downloading file for the following pack... on multiple modpacks i downloaded then tried working woth one of the modpacks again and then only that one works (i think i moved the modpack or something) i dont really know what this bug is but i tried going to where the modpack should be and it brought me to a dropbox page and it said error 404 cant find webpage your looking for.

Please contact the modpack author if its not an official, comes with the launcher, pack. If it is a pack that came with the launcher, please post a full and proper bug report as opposed to commandeering another post.

[Player timing out with an error when trying to connect]

Its less likely, but he could also have the appropriate ports actually closed

[Can't launch my custom server!]

Can you try and provide a crash report as opposed to asking us to install a broken modpack?

[Jurassic Build Not Working.]

I have absolutely no clue what you are talking about. Is this a custom modpack? Is this a individual mod? Is this a map? This a torrent of some homebrew movie?

If the awnser is any of the above, you'll want to ask the person who made it, as this wouldn't be the place.

[Gears not creating]

anybody in the server

Make sure the server is actually set up properly with tekkit, it sounds like the server is a vanilla server.

[I can not login into my account]

Because it doesn't care if you have minecraft on your computer. Its asking the mojang account if you've paid for a copy of the game, and mojang says no. Make sure your entering your mojang account details, and not your forum account details.

[Crashes after the mojang screen]

Java Version: 2.4

I... What? And operating system "Java"? I'd recommend sacrificing your computer to whatever evil pit it first originated from.

Or update your Java and try again.

[Cannot launch modpacks]

Well you are currently running Java 6, we are up to 7, version 45. I'd recommend updating java.

[Its not opening!]

Good to hear. For future reference on these forums, try to use the edit button at the bottom of your post as opposed to multiple posts.

[UPDATE VOLTZ]

the pack will contain whatever they want. if you want ICBM with biomes a plenty and whatever else keeps your jimmies from getting rustled, you could make it yourself.