QuoteSome of the applications that still aren't compatible with Vista include IBM Corp.'s Lotus Notes e-mail and collaboration suite; Cisco Systems Inc.'s and Check Point Software Technologies Ltd.'s VPN clients; Intuit Corp.'s accounting software QuickBooks 2006 and earlier versions; and anti-virus (AV) software from Trend Micro Inc. Intuit even took time in mid-December to warn QuickBooks users in a note that they should hold off on upgrading to Vista until after the U.S. tax season ends in April, citing compatibility with older versions of its software and "potential reliability issues" with Vista. IBM said Lotus Notes will support Vista by mid-2007; Lotus Notes 8, the next version of the suite, also will be available at that time on Vista. Cisco's VPN will support Vista some time in the first quarter of 2007. QuickBooks, Check Point's VPN client and Symantec and Trend Micro's AV software will support Vista following the consumer release. However, in some good news for users, McAfee Inc. already has Vista AV software on the market.