i got tired of just wait and press F5 on the jenkins page to see if player fixes the bug with the armor textures and the gui (background) of the iron furnace. So i just took a hexa editor (i just can't download mcp and jdk at 5kbps..) and edited those two files: GuiIronFurnace.class and ItemArmorIC2.class to change the paths and fix the bugs and i just want to share this with the community until the bug is offitially fixed.
Ah, and i copied the /assets/ic2/textures/armor/* to /assets/ic2/or/* And copied the furnace gui background (found on the minecraft.jar) to /assets/ic2/ffurnace.png.
i attached to this post the two classes edited and the jar file with that just done.
PS: Remember to delete the META-INF folder!
Edit: well, i can't upload .class and .jar files, so i compressed the three files into a zip one.