I don't know what you've been told, rebaselining images never gets old

expectations/gm/Test-ChromeOS-Alex-GMA3150-x86-Debug/expected-results.json

 {
   "expected-results": {
     "3x3bitmaprect_565.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
           12831071530564277917
         ]
       ], 
       "bugs": [
@@ skipping 4030 matching lines @@
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "lighting_8888.png": {
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          10120733278240648928
+          3703293568285547965
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }, 
     "lineclosepath_565.png": {
       "allowed-digests": [
         [
@@ skipping 1969 matching lines @@
           3173534857313460918
         ]
       ], 
       "bugs": [
         1578
       ], 
       "reviewed-by-human": false
     }
   }
 }