Created attachment 289934 [details] testcase See testcase, I see this assertion with current debug trunk build: ###!!! ASSERTION: constructing frames in the middle of reflow: 'mPresContext->mL ayoutPhaseCount[eLayoutPhase_Reflow] == 0', file c:\mozilla-build\mozilla\layout \base\nsPresContext.h, line 935 The testcase uses enhanced privileges, so you need to download it to your computer. To reproduce the assertion: - Visit testcase, scroll down with the overflow: scroll div. - Reload the page.
Maybe this is the same as bug 403605? Although that testcase is quite different from this one.
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