diff -urN OpenCV-2.3.0-orig/CMakeLists.txt OpenCV-2.3.0/CMakeLists.txt
--- OpenCV-2.3.0-orig/CMakeLists.txt	2011-07-04 07:21:50.000000000 +0300
+++ OpenCV-2.3.0/CMakeLists.txt	2011-08-14 03:02:57.072585001 +0300
@@ -845,8 +845,8 @@
         
         message(STATUS "CUDA NVCC target flags: ${CUDA_NVCC_FLAGS}")
     else()
-        unset(CUDA_ARCH_BIN CACHE)
-        unset(CUDA_ARCH_PTX CACHE)  
+        set(CUDA_ARCH_BIN)
+        set(CUDA_ARCH_PTX)  
     endif() 
 endif()
 
@@ -1422,7 +1422,7 @@
 # Solution folders:
 #-----------------------------------
 
-if(${CMAKE_VERSION} VERSION_GREATER "2.8.0")
+if(${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 2.8)
     set(ENABLE_SOLUTION_FOLDERS OFF CACHE BOOL "Solution folder in Visual Studio or in other IDEs")
 endif()