By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Tech stocks showed some signs of wavering as trading progressed Wednesday, with Facebook Inc. among the decliners as the social-networking leader's shares went into the red after surpassing their IPO level of more than a year ago.

Facebook (FB) fell 3%, to $36.51 after rising to as high as $38.31 and getting past the $38-a-share price it set when the company went public in May 2012.

On Tuesday, Facebook said it is launching a new program to help developers publish and promote mobile games over Facebook's platform.

Dell Inc. (DELL) also stood out, as its shares fell 3% to $12.48. A special committee of Dell's board of directors rejected a proposal supported by Chief Executive Michael Dell that would change the voting standard for Dell's effort to take the PC company private.

Michael Dell was trying to change the standard so that non-votes on the privatization would not be counted. The current standard treats non-votes the same as votes against the deal.

Yelp Inc. (YELP) shed 3%, to fall to $40.49 a share. The online local-recommendation company is scheduled to report quarterly results after Wednesday's market close.

Riverbed Technology Inc. (RVBD) was one of the tech sector's biggest percentage decliners, falling more than 11% to $15.56. The computer-networking equipment maker said late Tuesday that it swung to a second-quarter loss and reported revenue of $250 million, which fell below analysts' forecasts.

Decliners also came from Apple Inc. (AAPL), Oracle Corp. (ORCL), Yahoo Inc. (YHOO) and Netflix Inc. (NFLX).

Despite the broad losses, the tech-heavy Nasdaq Composite Index (RIXF) remained up by 12 points to 3,628 and the Philadelphia Semiconductor Index (SOX) was also on the rise.

Symantec Corp. (SYMC) rose 8.4% to $26.39 a share. Late Tuesday, the security-software company's reported fiscal first-quarter results that exceeded Wall Street analysts' forecasts.

Videogame publisher Take-Two Interactive Software Inc. (TTWO) was up 2.7% at $17.44 a share. The company reported upbeat quarterly results on Tuesday and set a Sept. 17 release date for its coming "Grand Theft Auto V" title.

Garmin Ltd. (GRMN) leapt more than 6%, at $39.62, a share after the maker of personal-navigation devices reported better-than-expected second-quarter results before the market open.

Intersil Corp. (ISIL) climbed more than 7%, to $9.95 a share, following the power-management technology company's late-Tuesday quarterly results. Nedham & Co. raised its rating on Intersil to buy from hold on Wednesday.

Among other leading tech stocks, gains came from Hewlett-Packard Co. (HPQ), Pandora Media Inc. (P), Microsoft Corp. (MSFT) and Qualcomm Inc. (QCOM)

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