I'm using MacVim installed with brew and everything works pretty fine, but (and there always is a "but") when I launch it as mvim from the terminal, it says

Error detected while processing /usr/local/Cellar/macvim/7.4-98/MacVim.app/Contents/Resources/vim/runtime/menu.vim:
line 1222:
E334: Menu not found: Window.Minimize

I'm pretty sure that the problem is in my .vimrc or my plugins, but I don't know how to find the one responsible. Here is my .vimrc (and it is in a bit of mess): http://pastebin.com/T7hJ8n1Z

What can I do to fix this? It's just a bit annoying.