"Our industry contacts were a little more cautious than in prior quarters. IT budgets remain challenged," writes BMO's Tim Long, who's cutting estimates for F5 (FFIV), Riverbed (RVBD), and Polycom (PLCM) on account of such feedback. Informatica's warning won't help soothe jitters. BMO peer Keith Bachman cut estimates today for 6 IT hardware names, while saying he thinks PC demand is "very weak" and distributor inventories are at elevated levels. That was before Seagate warned.