Shares of Sun Microsystems Inc were under pressure at the start of the week ahead of the company’s fiscal first quarter earnings due to be announced today. Goldman Sachs & Co analyst John Levinson was said to have made cautious comments on Monday but didn’t change his already lowered first-quarter earnings estimate, and the stock does remain on Goldman Sachs’ Recommended List. But Levinson is said to have indicated he is even more concerned about the potential for a disappointing quarter than before – Goldman Sachs is Sun’s investment banker so is well placed to have a good idea. On October 8, Levinson reduced his earnings estimate for the September quarter to 32 cents from a previous estimate of 42 cents, while elsewhere people were going for as little as 29 or 30 cents a share.