Hi,
... An instructor also reported when following up on one of these
reports seeing a problem in authoring space appear with the submit
button for question 5 at the top of the screen followed by the
list of correct answers normally at the bottom of the screen,
followed by question 5 and then the other four questions in their
correct order.
Yes, I received an e-mail from that same Illinois instructor with
screenshots of the browser display in Authoring Space. I also
received the XML of the particular homework problem.
I have not seen any reports of this issue from MSU students or instructors.
When viewing that same problem copied to my Authoring Space on a
development VM running the same Linux distro as used on the Illinois
LON-CAPA servers, and LON-CAPA 2.10.1-2011113023, I was able to
reproduce the reported error (form elements in an incorrect order),
once, when using Google Chrome 31.0.1650.57 on Mac OS after hitting
the "Reset submissions" button in the Authoring Space view about a
hundred times.
Using the same randomseed, and refreshing display of the problem,
caused the problem to now render as expected, i.e., with form
elements in the correct order.
I grabbed the HTML source of the page loaded in the lower frame in
Authoring Space for the two cases (a) form elements in incorrect
order, (b) form elements in correct order. Comparing the HTML the
only differences I saw were:
1. order of attributes in the <body> tag
2. different order of attributes in any <body> tags included withing
javascript (i.e., functions to generate spellcheck and scriptVars
windows).
3. different timestamps in banner link.
The order of form elements (input items, submit buttons etc.) in the
source HTML was the same for cases (a) and (b), and if read linearly
would have rendered the form elements in the expected order.
I validated the HTML using W3c validation and the only issue was some
javascript which was not enclosed within // <![CDATA[ // ]]>
I have not been able to reproduce the behavior using Firefox 25.0.1 on Mac OS.
Recent release history for Chrome and Firefox is as follows:
Chrome release: November 14, update to 31.0.1650.57 for Windows, Mac, Linux
Firefox release: November 15, update to 25.0.1 for Windows, Mac
Given that these issues have only been reported in the past few days,
and are only encountered sporadically, it does seem most likely that a
change in Chrome 31.0.1650.57 has resulted in this occasionally
observed behavior.
Stuart Raeburn
LON-CAPA Academic Consortium
Quoting "Mills, Douglas G" <dmi...@illinois.edu>:
HI All,
In the past two days I've received at least four reports from
students in different classes (so not using the same problems) of
parts of a multipart problem being presented out of order with the
submit buttons in the wrong places. An instructor also reported when
following up on one of these reports seeing a problem in authoring
space appear with the submit button for question 5 at the top of
the screen followed by the list of correct answers normally at the
bottom of the screen, followed by question 5 and then the other
four questions in their correct order. In hitting randomize many
times in Chrome I've been able to replicate this also. Initially I
thought it was a problem with a particular variation of the
problem itself, but taking any of the seeds and trying again does
not replicate the problem; indeed, even submitting an answer so
that the page reloads causes the problem to go away, so I'm
thinking this is some type of random issue with Google Chrome, not
with the coding or our problem itself. I'm still investigating
this, checking on browsers used by other students who had the
problem, etc. but so far it looks like Chrome on both Windows and
Mac computers. Anyone else seeing or hearing anything along these
lines?
Doug
Douglas Mills
Director of Instructional Technologies
Department of Chemistry
University of Illinois
dmi...@illinois.edu<mailto:dmi...@illinois.edu>
(217) 244-5739
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