Comment 5 for bug 252674

There's an XXX comment by BjornT above the line of code that's causing the problem (browser/bug.py:334):

We might end up returning less than :limit: bugs, but in
most cases we won't, and '4*limit' is here to prevent
this page from timing out in production. Later I'll fix
this properly by selecting bugs instead of bugtasks.
If fixed_bugtasks isn't sliced, it will take a long time
to iterate over it, even over just 10, because
Transaction.iterSelect() listifies the result.

I wonder if the workaround that this XXX marks is no longer working around the problem.