using LR4.1 with iMac i7, 8gb ram, system 10.7.3.
after a few edits, 15-20, there is constant delay as the image is blanked, redrawn, blanked, redrawn, etc. This occurs with most adjustments but does not start until 10 or 12 images have been processed.
have seen this referenced before but cannot find the thread.
this did not happen with lr3.6.
Just drag the Adobe Lightroom 4 app from your Applications folder to the trash. Then install 4.0. Then install the 4.1 RC over the top of 4.0. I suggest redownloading the 4.1 RC to make sure your download is not corrupt.
Please be sure to post back if this works for you. Thanks.
We're 3 for 3 fixing this with this technique, on Mac. Thanks for reporting back.
The flashing is really getting annoying.
For example, I was cropping an image today in 4.1RC and I had already cropped several images w/o a problem. I kept the same aspect ratio, dragged in the upper left and lower right to get close to what I wanted for the size of the crop and then clicked on the image to drag it into place.
During the drag the image flashed, a new crop rectangle was entered into the history and the actual crop radically changed. The zoom level and the placement jumped in value. I had to resize the crop and again attempt to move the image into the crop area. It flashed again during the first drag operation. A new size of crop was created and the zoom level again changed. Rinse and repeat. I simply could not get a proper crop. NOTE: During the entire 'drag' process I did not release the mouse. The flash happened during the drag.
I have experienced this exact problem in prior instances of LR and it affected the development sliders, too. The only remedy I have found is to exit LR and once again it will work correctly for a handful of images. When it starts up again I immediately exit and restart.
Adobe really needs to find out what is going here and either squash this bug or let us know that 'something' besides LR is causing the problem. Note, I have never had a similar problem in any other image editing software be it from Adobe or anyone else--just LR.
27" i7 iMac; 2.93GHz QuadCore CPU, 16GB DRAM; ATI Radeon HD 5750 1024 MB