hello, since I updated from 1.4.7 to 1.5.1 I have been getting an error when downloading files from the lib folder, here is the log:

 

2013-04-29 12:39:57 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.1.29.662 for Minecraft 1.5.1 loading

2013-04-29 12:39:57 [iNFO] [ForgeModLoader] Java is Java HotSpot Client VM, version 1.7.0_21, running on Windows 7:x86:6.1, installed at C:\Program Files\Java\jre7

2013-04-29 12:39:57 [FINE] [ForgeModLoader] Java classpath at launch is /C:/Users/gabriel/AppData/Local/Temp/e4jB202.tmp_dir/MinecraftSP.jar

2013-04-29 12:39:57 [FINE] [ForgeModLoader] Java library path at launch is C:\Windows\system32;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Windows Live\Shared;C:\Program Files\Samsung\Samsung PC Studio 3\;C:\Program Files\QuickTime\QTSystem\;;c:\program files\java\jre7\bin;.

2013-04-29 12:39:57 [FINE] [ForgeModLoader] Enabling runtime deobfuscation

2013-04-29 12:39:57 [FINEST] [ForgeModLoader] All core mods are successfully located

2013-04-29 12:39:57 [FINEST] [ForgeModLoader] Discovering coremods

2013-04-29 12:39:57 [FINEST] [ForgeModLoader] Found library file argo-small-3.2.jar present and correct in lib dir

2013-04-29 12:39:57 [FINEST] [ForgeModLoader] Found library file guava-14.0-rc3.jar present and correct in lib dir

2013-04-29 12:39:58 [FINEST] [ForgeModLoader] Found library file asm-all-4.1.jar present and correct in lib dir

2013-04-29 12:39:58 [FINEST] [ForgeModLoader] Found library file bcprov-jdk15on-148.jar present and correct in lib dir

2013-04-29 12:39:58 [FINEST] [ForgeModLoader] Found library file deobfuscation_data_1.5.1.zip present and correct in lib dir

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] There were errors during initial FML setup. Some files failed to download or were otherwise corrupted. You will need to manually obtain the following files from these download links and ensure your lib directory is clean.

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/argo-small-3.2.jar

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/guava-14.0-rc3.jar

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/asm-all-4.1.jar

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/deobfuscation_data_1.5.1.zip

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/scala-library.jar

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] <===========>

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] The following is the errors that caused the setup to fail. They may help you diagnose and resolve the issue

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] The file scala-library.jar was found in your lib directory and has an invalid checksum 246865d5fc28987ce4d1ec0280f11377f9b4867c (expecting 458d046151ad179c85429ed7420ffb1eaf6ddf85) - it is unlikely to be the correct download, please move it out of the way and try again.

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] <<< ==== >>>

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] The following is diagnostic information for developers to review.

2013-04-29 12:39:59 [sEVERE] [ForgeModLoader] Error details

java.lang.RuntimeException: The file scala-library.jar was found in your lib directory and has an invalid checksum 246865d5fc28987ce4d1ec0280f11377f9b4867c (expecting 458d046151ad179c85429ed7420ffb1eaf6ddf85) - it is unlikely to be the correct download, please move it out of the way and try again.

at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:193)

at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:172)

at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:259)

at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:229)

at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)

at net.minecraft.Launcher.replace(Launcher.java:153)

at net.minecraft.Launcher$1.run(Launcher.java:94)

2013-04-29 12:40:01 [iNFO] [sTDERR] Exception in thread "Thread-2" java.lang.RuntimeException: java.lang.RuntimeException: A fatal error occured and FML cannot continue

2013-04-29 12:40:01 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:192)

2013-04-29 12:40:01 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:259)

2013-04-29 12:40:01 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:229)

2013-04-29 12:40:01 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)

2013-04-29 12:40:01 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:153)

2013-04-29 12:40:01 [iNFO] [sTDERR] at net.minecraft.Launcher$1.run(Launcher.java:94)

2013-04-29 12:40:01 [iNFO] [sTDERR] Caused by: java.lang.RuntimeException: A fatal error occured and FML cannot continue

2013-04-29 12:40:01 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:261)

2013-04-29 12:40:01 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:172)

2013-04-29 12:40:01 [iNFO] [sTDERR] ... 5 more

 

 

And yes, I've tried downloading the files manually force the update and the like.

Read your log. If you've done it manually something is corrupting your download, fix it.