just for information and interest:
in iron (0.3.155.0) i have no such problem.
2. in chrome (v0.3.154.9) i currently cannot use the 'standard' (ie ajaxified) view of gmail in two separate tabs; i have to have the second one in 'basic HTML' view, otherwise the view won't load.
in iron (0.3.155.0) - using the same email accounts - i have no such problem.
well done, iron man!