I was updating page layouts, in MOSS, to contain preview images for each one of them. But when I upgrade the solution and activate the feature no preview images were available in the 'Create Page" section. I also updated the descriptive text for each page layout but nothing happened. I've checked the files in FEATURE directory to see if they were updated by looking at the time stamp. And they are indeed updated here. But when I check the time stamp in the Master page gallery the time stamp is not updated. I've also checked the Preview Image directory in Master page gallery to see if the preview images were uploaded. And they are uploaded correctly.
None of the page layouts are customized. I used Becky Bertrams quick script : blog.beckybertram.com/Lists/Posts/Post.aspx?ID=9 to perform this check. I've also tried changing some of the HTML of the page layouts to check if it were updated. All HTML changes are updated as expected.