This is due to the use of 'visibilty' collapse. I have an optimization I can make once box frames stop using collapse for reflow purposes.

The code in StyleDisplayImpl::CalcDifference for visibility should only return NS_STYLE_HINT_REFLOW if the mDisplay is table row or table col. This needs still needs to be reconciled with nsBoxFrame's usage of collapse first.

Moving [DOGFOOD] in Status Summary to dogfood in keyword field.

Old bug, still a problem. for dogfood?

PDT-

*** Bug 29605 has been marked as a duplicate of this bug. ***

Moving crufty m14-m15 bugs out to m16 for proper triage.

Putting on [dogfood-] radar.

*** Bug 31257 has been marked as a duplicate of this bug. ***

transferring perf keyword and cc list from dup'd bug 31257

Pierre pique'd my interest in this one, so I added myself to the CC list. I'll try to contribute some ideas based on Pierre's prior efforts soon.

Block moved M17 bugs to mozilla0.9

Netscape's standard compliance QA team reorganised itself once again, so taking remaining non-tables style bugs. Sorry about the spam. I tried to get this done directly at the database level, but apparently that is "not easy because of the shadow db", "plus it screws up the audit trail", so no can do...

It doesn't seem to be a problem anymore. We'll check it out for a future milestone.

I think this is based on misuse of the meaning of 'visibility: collapse', which should generally cause a reflow (based on what it means for tables, which is the only thing it really applies to in the CSS spec). One possible improvement, though, would be to have ComputeDisplayData change 'collapse' to 'hidden' in some cases. It seems a bit odd to poke at other structs in CalcStyleDifference. Is this still an issue for comboboxes? I suspect not, and even if it is it's unlikely to be once XBL form controls are turned on.

Assigning pierre's remaining Style System-related bugs to myself.

this page has enough comboboxes to test, but I don't see any (visible) reflow..?!

Is this bug still valid at all?

We seem to handle this by hiding or showing the popup view now... jkeiser? roc? Could you verify that please?

I don't think 'visibility:collapse' is used for the dropdown anymore.