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Honestly, just by doing my stuff I do for Google, all my words rank super high in Bing. It just happens there. They seem to also stick much better in Bing, very little movement once I am at the top.

Such a quick increase in links could mean spammy/low quality links or the ratio of follow/don't follow went awry and that would also decrease it.

In SEO it isn't as black and white as more links == better.

If they are of no value to anybody, I'd just block them.

These could be legacy results for Yahoo. They are using Bing for a while now, I believe. Do your Yahoo rankings change at all, or are they just sitting there for any amount of time.

If this is all that happened the next crawl should fix it. Just sit tight and they should bounce up again in a week or so.

Yup it's spambots like xrumer or w/e there is. Blackhatters tend to blast out like 10k links at once of which most won't get approved. It's quite annoying. Every WP blog I started  so far was getting buried in these. Thank god for anti-spam widgets.

Chrome takes care of that pretty well. I am not aware of any widgets per se. I assume you are looking to install this on your website, right?

Wordpress or Joomla strike me as the obvious choices. Both are free and really easy to use.

If the link is embedded in the Flash part of the website, Google will have a hard time indexing it so most likely you will not get much out of it sadly. Flash components appear as a big nothing to the crawler.

Make sure you log-in on top of it. It worked for me just a moment ago.

I am in a similar situation. Your best bet would be a blog or something similar covering industry news or company related information, such as new features or similar. Also guides or so could be one source. It is difficult for this kind of website though to release content without it seeming out of place.

I don't see a way to edit it, so I'd recommend to just start a new campaign with the correct name.

If it gets you conversions and ultimately more money, of course. Just ranking highly doesn't make you more money, conversions are what matters in the end.

Such a quick increase in links could mean spammy/low quality links or the ratio of follow/don't follow went awry and that would also decrease it.

In SEO it isn't as black and white as more links == better.

If you are getting this information through the SEOmoz crawl, clicking on the red 'Error' button should give you details which URLs exactly give 4XX errors. It will show you which  site returns the error, not where the link is though. If you forwarded the missing pages that would somewhat fix it. Another good idea to improve this would be to create a useful 404 error page that allows people to find what they need. Some advice on how to handle this: http://www.seomoz.org/blog/are-404-pages-always-bad-for-seo

I would leave out the punctuation to be honest. Not just in favor of the keyword match, but also for the users. I, personally, would be much more inclined to click on a website with the title "What is Actinide?" than "What is...Actinide?". Better in both ways.

I experience exactly the same, often keyword go up and down by 1-2 every other day until they suddenly leap up 10 or so and then drop 2-3 where they stay. Your theories both make sense and it might be just that the crawl gets to your site and does an in-depth 'scan' of everything.

These member profiles etc cause a lot of problems. I just restricted the crawler from forums/*/members and it fixed A LOT of problems. I don't see value in Google having access to the members list on the forums and it is a common 'blackhat' technique to sneak links into profiles on forums.

404s are something do be avoided as it makes your website look 'abandoned' in a way. If possible, I would set up 301s or similar to send these links to your main website rather than to 404 pages. You could also create a nice 404 site.

See these for more information:

http://www.seomoz.org/blog/are-404-pages-always-bad-for-seo

http://www.seomoz.org/blog/personalizing-your-404-error-pages

A bit of work can go a long way.

I have the same problem. There always was a lag, but not as bad as now. It does show the update from 8/15 in my keywords, but not the overall traffic report.