[Webkit-unassigned] [Bug 26621] New: Intermittent pages partially load (missing images or CSS) or don't load at all (blank page)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=26621

           Summary: Intermittent pages partially load (missing images or
                    CSS) or don't load at all (blank page)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
               URL: http://www.wccnet.edu
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Accessibility
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: srick at wccnet.edu


We believe that we have found a bug with Webkit based on using the Safari 4
browser on our website.

Our website uses extensive URL redirecting on its assests. On user navigation
or reload, the page either doesn't load 
certain elements (missing images, missing CSS styling, etc.) or doesn't load a
page at all (the screen remains white). AJAX-loaded 
content also seems affected. 

This problem is intermittant and it has taken anywhere from under a minute to
over ten minutes for our testing to 
uncover a partially-loaded or non-loaded page. Our logs do not show any
indication of there being too many redirects for 
either the URL or for the assets being loaded on the page.

This bug is affecting both web pages as well as specific files: for example, on
Safari 4.0.0, a page that doesn't load (blank page) 
gives the error "too many HTTP redirects" in the Activity window. This error
generally shows while the page is attempting to load 
favicon.ico. In addition, when a page partially loads and has missing graphics,
attempting to load a missing graphic in a new 
tab or window results in a Safari error telling us that "Too many redirects
occured while trying to open the image."

When the browser is restarted with an emptied cache and history, the page has
no problems loading. 

This bug affects various pages on the wccnet domain, but is most noticeable
while navigating through the following sections:
http://www.wccnet.edu/lifelong-learning/
http://www.wccnet.edu/news-events/
http://www.wccnet.edu/calendar/
    Especially noticable while navigating through the arrows around the "June
2009" label (may need to reload calendar to see it)

We suspect that the problem is with cached redirects. Have you identified this
issue in Safari 4? The problem is not present 
in Safari 3, or any other major browsers (such as Firefox 2 & 3 or IE 7 & 8).

After light testing in both Panic's Coda and NetNewsWire and seeing similar
results, it's our guess that WebKit may be the 
source of the issue. We intend to further research this via WebKit, but would
also appreciate a response from Apple regarding 
the issue being present in Safari. If, however, you discover that the problem
is on our end, we would be happy to hear 
your suggestions for fixing it. We did find other users reporting similar
problems:
http://forum.cmsmadesimple.org/index.php?topic=34710.msg163850

We did our testing on Safari 4.0 (4530.17), 4.0.1 (5530.18), NetNewsWire 3.1.7
and Coda 1.6.4, all for Mac OSX 10.5. 
In addition, we installed the nightly build of Webkit r44932 onto Safari 4.0.1,
and are still experiencing these problems. 
The instances of pages partially loading seemed to go down, however nearly
every page load resulted in a blank page.

If you would like additional data to further research this problem, feel free
to email us at websupport at wccnet.edu.

Thanks for looking into this,
Washtenaw Community College
Web Operations


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