On The Fly: Analyst Upgrade Summary Today's noteworthy upgrades include: AmerisourceBergen (ABC) upgraded to Outperform from Market Perform at Leerink... Arthur J. Gallagher (AJG) upgraded to Buy from Neutral at Goldman... Catamaran (CTRX) upgraded to Buy from Neutral at UBS... Disney (DIS) upgraded to Outperform from Neutral at Macquarie... Fly Leasing (FLY) upgraded to Buy from Neutral at Citigroup... Navistar (NAV) upgraded to Market Perform from Underperform... Questcor (QCOR) upgraded to Buy from Fair Value at CRT Capital... Talisman Energy (TLM) upgraded to Buy from Hold at Tudor Pickering... Synergetics (SURG) upgraded to Buy from Hold at Craig-Hallum... RBC Bearings (ROLL) upgraded to Outperform from Market Perform at Barrington.