Should he pray behind one who did not wash his hands again when he washed his arms in udu?

Did it ever happen that the Prophet (peace and blessings of Allaah be upon him) started to pray when he was junub by mistake?

When is it prescribed for the person praying behind the imam to say the Taslim to his right?

Ruling on praying behind one who claims to read palms and coffee cups

Can he be alone with a woman to lead her in prayer?

Ruling on praying behind someone who smokes

Praying behind a sufi imam

Appointing someone else to take over as imam during the prayer

Should he pray behind someone who says that it is not obligatory for women to cover their hair?

Should he do the prostration of forgetfulness after doing the part of the prayer that he has to make up?