Firefox issues...

[Newby]

Lately, Firefox thinks loading the page like this is cool (click for big):



Problem is, it's not a network issue - the same page loaded in Opera (click for big):



And rather than post an image with IE working, well, just take my word for it that IE7 loads them correctly as well.

I changed absolutely nothing settings-wise, and while I noticed some ICMP packets being dropped as of today (from my router to the internet, I was losing between 20-30% of my ICMP traffic, but this could just be regular since I never test it) TCP packets were absolutely fine.

Help!

EDIT to clarify: any page loads like that if there are multiple images, it would seem. Nothing shows up in my router logs.

[iago]

There's an option to disable the automatic download of images. Perhaps it got turned off by accident somehow? A gamma ray hit the bit or something?

Settings -> Content -> Load Images Automatically

[Newby]

That's still ticked on. On occasion, it'll load some images. But for the most part, it looks like that.

[iago]

I think you need to packetlog it to get more details.

[Newby]

Hmm. All of my checksums are apparently incorrect.

Observe just one:

Checksum: 0xaf39 [incorrect, should be 0x3885 (maybe caused by "TCP checksum offload"?)]

And in this window:



Might that have anything to do with it? I can save the packetlog if you'd like.

[MyndFyre]

@iago: You can see the Google logo and some other images are still loaded, so you know that the other setting isn't the issue.

@Newby: that's really odd.  Does anyone know whether Firefox implements its own TCP/IP stack? 

Since the removal of SOCKET_RAW in XPSP2, I didn't think it would be possible to do so on Windows.  But TCP should be auto-correcting for these things.

Microsoft is putting the smack down on Firefox?

[iago]

Newby, it looks like you're having some serious network issues. I'd say you have a problem with a network cable or a network card or possibly your computer or router itself. And you can't rule out your ISP.

@Newby: that's really odd.  Does anyone know whether Firefox implements its own TCP/IP stack? 

Yeah, no.

[Sidoh]

Do the pages work consistently in Opera?  Maybe it wouldn't be a bad idea to packet log an Opera session. :\

[Newby]

Newby, it looks like you're having some serious network issues. I'd say you have a problem with a network cable or a network card or possibly your computer or router itself. And you can't rule out your ISP.

That was packetlogged FROM my computer. So, I don't think it's my router. It definitely could be my network card, though, which is weird.

Do the pages work consistently in Opera?  Maybe it wouldn't be a bad idea to packet log an Opera session. :\

Yep. Let me do that.

Odd. Not only does my Opera session suffer from the same checksum error, but all of my packets seem to. Observe:

[MyndFyre]

Maybe it's a driver bug?

[Newby]

I don't think it's a driver issue -- M$ drivers are pretty solid. And it arose randomly yesterday.

I know I tinkered with some network setting with netsh a while back, but I don't think it had anything to do with checksumming.

[warz]

all ur imgz belong to me

[Sidoh]

Does this happen on other computers on your network?  Try switching the port the cable coming from your computer plugs into.  If it's still happening, maybe try plugging directly into the modem if possible.  Try another computer on the same cable too.

[Newby]

Well, I'm not sure if checksum offloading was the issue, but I fixed my checksum offloading issue (it apparently was offloading it to the hardware to calculate -- not anymore!) so we'll see if this clears it up.

As it turns out, a live packet log tells me that after it resolves the domain name, Firefox makes no attempts to connect to the server. At all. It just sits there, telling me it's loading. Opera, on the other hand, works fine. :|

[Sidoh]

How strange.  I've had problems with checksum offloading as well.  When I used to play WoW, the game bugged out really frequently after a patch or any time there was a "rush" of information.  Some posts on the support forums recommended disabling Checksum Offloading and it worked perfectly.  Didn't have a single problem after that.