Comment on AbuBakr_Fin's post
But if you mean is it OK to visit Al-Masjid An-Nabawi during Hajj, then the answer is it`s not a part of Hajj itself, it`s not from the `manaasik`, but it`s a great Sunnah to make Solaah in Al-Masjid An-Nabawi. Myself I didn`t visit his -sAaws- grave uot of respect for his -sAaws- because when he -sAaws- was dying he cursed the people before who took the graves of their Prophets -sAaws- as places of worship. Unfortunately nowadays the Mosque has been expanded so that the holy qabr of Rasuul -sAaws- is inside. So I never went there, but it`s not Haraam according to some, it IS a holy place in itself, and especially the place between the qabr of Rasuul -sAaws- and the mimbar. And that`s where Al-Bukhari would pray Solaah al-istikhara before writing any Hadiith to his SoHiiH. So I don`t want to argue about that.
Comment on AbuBakr_Fin's post
I definitely advice visiting Al-Masjid An-Nabawi anytime, or Al-Madina Al-Munawwarah for that matter, and so did Rasuulullaah in many Hadiiths. There`s no place in the world like it other than it, and you can literally see the nuur (al-munawwarah). But the manaasik of Hajj Allaah taught to Ibraahiim, and perfected them (Look for tafsiir for the Verse 128 of Al-Baqarah). Masjid An-Nabawi was not present until MuHammad -sAaws- built it with SoHaabah -rAa. And if you are looking for some evidences against newly invented matters, then you have to understand what is difference between limited and unlimited worship, and you have to know what it maSlaH mursal. You need some fiqh before you can say this or that is bid`a, but anyway generally speaking Verse 3 in Suurat Al-Maaidah closes the gates. And Allaah knows best
Comment on AbuBakr_Fin's post
Just so I make myself clear: Pray in the Mosque of your beloved Prophet -sAaws! Don`t hesitate. Only don`t make shirk there, and don`t make du`aa to him -sAaws- like someone shouted in sujuud there: "jaa Rasuulallaah!" (It`s definitely Haraam. See: 72:18) So did I too (pray there), but I didn`t go to his grave -sAaws- to give him salaam. The reason I already told you. And sufficient for anyone is to say SollAllaahu `aleihi wa sallam, or the like of that, and we give him our Salaam minimum in every Solaah in tashhahud.