LupusNoctu

Yup. It works as expected after manually injecting Forge into minecraft.jar. And Magic Launcher still gets along with the modded jar, allowing me to set up profiles, so that's good. Curious that it wasn't able to inject fmlversion.properties automatically though. Maybe it has something to do with linux file permissions? But at that point, it would be a problem with Magic Launcher then, wouldn't it? I might head over to them if I decide I care enough or hear of others starting to have this same problem. If I'm wrong and it is something on your end, feel free to contact me if I can be of any help. Anyways, thank you much LexManos.

I'm getting a launch failure that seems to be due to missing version information somewhere. Of course, I'll give the full log below so you can verify, but the lines of interest seem to be: 2013-06-05 19:50:58 [iNFO] [ForgeModLoader] Forge Mod Loader version missing.missing.missing.missing for Minecraft missing loading ... 2013-06-05 19:50:58 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/deobfuscation_data_missing.zip 2013-06-05 19:50:58 [sEVERE] [ForgeModLoader] There was a problem downloading the file deobfuscation_data_missing.zip automatically. Perhaps you have an environment without internet access. You will need to download the file manually or restart and let it try again ... I tried to to bypass the problem by download that file directly and was not surprised when it didn't exist on the server. I backed up to fmllibs and grabbed deobfuscation_data_1.5.2.zip, as that matches the version of my minecraft client, and renamed it to deobfuscation_data_missing.zip to match the filename that FML is looking for and tried again, not knowing that FML checked checksums.... 2013-06-05 20:05:35 [sEVERE] [ForgeModLoader] Error details java.lang.RuntimeException: The file deobfuscation_data_missing.zip was found in your lib directory and has an invalid checksum 446e55cd986582c70fcf12cb27bc00114c5adfd9 (expecting deadbeef) - it is unlikely to be the correct download, please move it out of the way and try again. No surprise there, given that the checksum is checked. I tried googling those log entries to see if there was perhaps something I was doing wrong and came up empty. However, I did notice that every other log I've looked at pulls a version of deobfuscation_data_*.zip that matches the minecraft version being used, confirming my suspicion that FML tries to decide what version of the file to grab by the minecraft version, and since mine just gets "missing", it obviously fails. I have tried grabbing a clean minecraft.jar via the official launcher just in case, still no luck. I'm using: Magic Launcher 1.1.4 Minecraft Forge 7.8.0.723-universal for Minecraft 1.5.2 While troubleshooting, I've only added Forge to the mod list in Magic Launcher, and disabled all my external mods. Log from before downloading: Logs after downloading file and renaming to match what FML was looking for: