Yahoo! ( YHOO) was by far the most densely traded loser after the closing bell rang Tuesday.

Shares of the Web portal operator recently sank 10.1% after it offered a soft sales forecast for 2008 -- $5.35 billion to $5.95 billion. That leans to the lower end of Thomson Financial's analyst consensus, which averages at roughly $5.9 billion. For the fourth quarter, Yahoo! came in well ahead with non-GAAP income of $296.5 million, or 21 cents a share, on sales of $1.7 billion. Wall Street was looking for just 11 cents a share on revenue of $1.41 billion.

In a separate announcement, the Sunnyvale, Calif., company also said it has installed Aristotle "Ari" Balogh as chief technology officer. Yahoo! shares were off $2.11 to $18.70.

Also foundering after the close was Hutchison Technology ( HTCH), a data-storage-disk maker. Shares tumbled 19.2% to $19.58 after it posted dwindling earnings of 14 cents a share, excluding a litigation charge, falling far short of the 37-cent average analyst target. A year earlier, the Minnesota-based company had made 22 cents a share.

Align Technology ( ALGN - Get Report) shares lost 20% to $11.20 after the maker of Invisalign braces didn't swing to a big enough profit, registering a penny shy of analysts' 9-cent EPS expectations. And fellow Californian outfit Cymer ( CYMI) saw its per-share profit lift by 2 cents to 67 cents a share, but that was also 2 cents off the mean. Shares of the semiconductor-equipment maker surrendered $5.13, or 15.1%, to $27.75, in recent extended trading.

Among the late winners, however, was Flextronics International ( FLEX - Get Report), which reported soaring adjusted income of $250 million, or 30 cents a share, on sales that ramped up 67.5% year over year to $9.07 billion. Analysts were seeking just 26 cents a share on $8.6 billion in revenue; a year ago, the Singapore-based tech shop made 23 cents a share on an adjusted basis. Flextronics stock was tacking on 3.3% to $10.65.

And San Diego's Websense ( WBSN) leapt 8.2% after non-GAAP income came to $12.8 million, or 28 cents a share, up from 25 cents a share last year. Wall Street had expected the IT security company's earnings to fall by 2 cents a share year over year. On a GAAP basis, Websense swung to a quarterly loss, but the company also enjoyed ballooning, better-than-expected revenue and guided well above Street sales views for 2008. Shares were adding $1.40 to $18.50.

Elsewhere, Lehman Brothers gained ground after the New York brokerage hiked up its annual dividend by 8 cents to 68 cents a share and said it would bring its share-repurchase authorization back to the 100-million-share sum it had established a year ago. That amount takes into account the diluting effect of stock option grants. Lehman shares were up $2.17, or 3.5%, to $64.70, after the close.