Shares in Micro Focus took a major tumble, losing almost a third, after the business software specialist reported third quarter revenues that came in well short of expectations.The group will take a restructuring hit of between $14m and $18m in the final quarter of this year after the "disappointing" three months.Heading the other way is heavily indebted foods group Premier Foods, despite announcing that total sales in 2010 fell 3.5%.Net debt fell £103m over the course of the year to £1,261m. The company has recently offloaded its Canning and Meat-Free assets, as a result of which pro-forma net debt will be below £900m, the company said.London Stock Exchange is in the red on news that Dubai's stake could hamper its merger with the Toronto Stock Exchange.Computacenter is on the rise after buying Paris-based IT reseller Top Info SAS for £17.6m. The acquisition will add four new locations to Computacenter's French business. Customers include EDF, SNCF and Credit Agricole.FTSE 250 - RisersPremier Foods (PFD) 25.44p +15.11%Imagination Technologies Group (IMG) 390.10p +14.94%Brewin Dolphin Holdings (BRW) 169.60p +2.79%JD Sports Fashion (JD.) 871.00p +2.47%Paragon Group Of Companies (PAG) 191.30p +2.30%Exillon Energy (EXI) 400.00p +2.15%Computacenter (CCC) 418.40p +2.05%Hochschild Mining (HOC) 517.50p +1.97%AG Barr (BAG) 1,125.00p +1.90%Go-Ahead Group (GOG) 1,292.00p +1.73%FTSE 250 - FallersMicro Focus International Plc (MCRO) 285.50p -27.72%Cable & Wireless Worldwide (CW.) 72.90p -4.08%EnQuest (ENQ) 136.60p -4.01%Sportingbet (SBT) 49.20p -3.91%Hays (HAS) 120.70p -3.75%Domino's Pizza UK & IRL (DOM) 504.00p -3.63%London Stock Exchange Group (LSE) 899.50p -3.28%Kier Group (KIE) 1,208.00p -2.97%Punch Taverns (PUB) 67.00p -2.90%Regus (RGU) 105.10p -2.87%