Current released versions of FPC (2.6.x) do not include support for SEH handling. This can affect the stability of many 64 bit applications. Therefore it is recommended to use the 32bit IDE, and generate 32bit applications only. This will change when FPC 3.0 is released. Please visit our forums and Wiki for additional information.http://wiki.lazarus.freepascal.org/Windows_Programming_Tips#FPC_2.6.x.2FLazarus_warning_.28Missing_support_for_SEH.29
May be you seem to remember this:QuoteCurrent released versions of FPC (2.6.x) do not include support for SEH handling. This can affect the stability of many 64 bit applications. Therefore it is recommended to use the 32bit IDE, and generate 32bit applications only. This will change when FPC 3.0 is released. Please visit our forums and Wiki for additional information.http://wiki.lazarus.freepascal.org/Windows_Programming_Tips#FPC_2.6.x.2FLazarus_warning_.28Missing_support_for_SEH.29If so, this is not true since Lazarus 1.6.