I would like to suggest the addition of a new command - :tcd[!] {path}
This command would be like :cd and :lcd, but instead of changing the global or window relative directory, :tcd would change the directory for the current tab resulting in all currently open windows on that tab and any new windows opened on the tab having the supplied directory as their new current working directory. I think this command would be extremely useful when editing files from one project in one tab and files from another project in another tab. Currently this functionality could be implemented via a plugin, but inclusion as a built in vim command would make for a more elegant solution and would not require users to download any separate files to utilize it. -- eric