“Weaker gross margins and sales of Power Macs dampened enthusiasm for Apple shares Thursday even though the company reported first-quarter revenue that grew 36 percent over a year ago,” reports CBS Marketwatch. Apple fell US$1.53, or 6.3 percent, to trade at $22.67. Analysts said they were concerned with sales to Apple’s professional customer base, as Power Mac sales fell to 206,000 units from 221,000 in the previous quarter. They were also concerned about Apple’s Gross margins, which slipped to 26.7 percent from 27.6 percent a year earlier.