I don't understand why this should be, but it happens to me quite often: I click a view tab and wait many, many, seconds for it to be loaded. This doesn't happen for the main view, nor does it happen for all the views, but in my case, it happens with a view that I use quite regularly. There is nothing particularly special about the view: it is a view defined by checking off a bunch of jobs, rather than a regexp. The regexp views seem to load faster.
Any thoughts? -P