Question Script error on IE8, Number expected

Kunena 1.6.2, Joomla 1.5.22, CB 1.3.1

When pushing the button submit in IE8 for a reply to a post, I'm getting this error in the browser, any idea from where this could come from?

Thanks a lot for your support.

Message : Number expected
Ligne : 1
Caractère : 2585
Code : 0
URI : www.vagracing.ch/plugins/system/mtupgrade/mootools.js

Thank you for your question about problems with your website. It would help others to help you if they could see your K 1.6 configuration report. Do these IE8 Javascript errors prevent you or your users from actually using Kunena? How do these errors prevent you or your users from actually using Kunena? Thank you.

Actually the error appears on IE8 but the post is anyway validated, no blocking issue, but not good to see errors on browser, it scares people...

Here's my configuration :

Database collation check: The collation of your table fields are correct

Legacy mode: Disabled | Joomla! SEF: Enabled | Joomla! SEF rewrite: Enabled | FTP layer: Enabled |

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 10 seconds | Max execution memory: 96M | Max file upload: 300M

Joomla default template details : ja_anion | author: JoomlArt.com | version: 1.2.4 | creationdate: 08/16/10

Kunena default template details : Blue Eagle (default) | author: Kunena Team | version: 1.6.2 | creationdate: 2010-12-29

Kunena version detailled: Installed version: 1.6.2 | Build: 3894 | Version name: Team | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_title	VAGS-SRT
board_offline	0
board_ofset	0.00
offline_message	<h2>The Forum is currently offline for maintenance.</h2> <div>Check back soon!</div>
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template	default
showannouncement	1
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showchildcaticon	1
annmodid	62
rtewidth	450
rteheight	300
enableforumjump	1
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askemail	0
showemail	0
showuserstats	1
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useredittime	600
useredittimegrace	0
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allowsubscriptions	1
subscriptionschecked	0
allowfavorites	1
maxsubject	83
maxsig	1000
regonly	0
changename	0
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floodprotection	0
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
avatarquality	100
avatarsize	5000
allowimageupload	0
allowimageregupload	1
imageheight	2670
imagewidth	3560
imagesize	15000
allowfileupload	0
allowfileregupload	1
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	15000
showranking	1
rankimages	1
avatar_src	fb
fb_profile	fb
pm_component	no
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	0
userlist_username	1
userlist_posts	1
userlist_karma	0
userlist_email	0
userlist_usertype	0
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popusercount	100
showpopsubjectstats	1
popsubjectcount	25
usernamechange	0
rules_infb	1
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help_infb	1
help_cid	1
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showvideotag	1
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trimlongurls	0
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	fr-fr
fbsessiontimeout	3600
highlightcode	0
rss_type	recent
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	1
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	900
fbdefaultpage	recent
default_sort	asc
alphauserpointsnumchars	0
sef	1
sefcats	0
sefutf8	0
showimgforguest	1
showfileforguest	1
pollnboptions	6
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	mesid
post_dateformat	datetime
post_dateformat_hover	datetime
hide_ip	1
js_actstr_integration	0
imagetypes	jpg,jpeg,gif,png,JPG,JPEG,GIF,PNG
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	100
thumbheight	145
thumbwidth	145
hideuserprofileinfo	put_empty
integration_access	communitybuilder
integration_login	none
integration_avatar	communitybuilder
integration_profile	communitybuilder
integration_private	uddeim
integration_activity	communitybuilder
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	1
showpopthankyoustats	1
popthankscount	100
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
activity_limit	0
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	0

Third-party components: AlphaUserPoints: Disabled or not installed | CommunityBuilder: Installed (Version : 1.3.1) | Jomsocial: Disabled or not installed | UddeIm: Installed (Version : 2.1)

Third-party SEF components: sh404sef: Disabled or not installed | ARTIO JoomSEF: Disabled or not installed | AceSEF: Disabled or not installed

Plugins: System - Mootools12: Disabled | System - Mootools Upgrade: Enabled | JFirePHP: Disabled or not installed | Kunena Discuss: Enabled (Version : 1.6.2) | Kunena Search: Disabled or not installed | My Kunena Forum Menu: Disabled or not installed | My Kunena Forum Posts: Disabled or not installed

Modules: Kunena Latest: Enabled (Version : 1.6.2) | Kunena Stats: Enabled (Version : 1.6.2) | Kunena Login: Disabled or not installed

audisport wrote: Actually the error appears on IE8 but the post is anyway validated, no blocking issue, but not good to see errors on browser, it scares people...

I agree. Internet Explorer 8 is pretty scary!

Being serious, IE8 has a lot of issues because it just does everything differently. The whole DOM is implemented differently by Microsoft. It's a big issue - too big to be discussed with any competence in this forum - that confronts all website developers. Joomla does a reasonable job of keeping things clean (and that's why Kunena adopted Mootools 1.2.4 ) but not all Joomla extension developers have kept the faith. What you will find, unfortunately, is that some developers supply their own Javascript code that is not 100% compatible with IE 8 and that, unfortunately, is a fact of life. So, in summary, this problem may be a Kunena problem or it may be caused by something else.

The only way to be 100% sure about what is causing this problem is to eliminate everything until you are left with a situation that you do not see this error. If you would really like to do this we can suggest ways for you to go about it. However, I should warn you, it could take you a long time to identify what, specifically, is the cause.

We've received hundreds of questions in this forum (and I know that these questions are asked millions of times in other forums that I have used) about trying to purify websites so that they don't get these IE 8 "script errors". I have to say that, in my opinion, the cost of eliminating the problem can shorten people's lives because of the apparent stress that they seem to suffer. So, while I agree with you that these kinds of things may "scare" people I would advise people to not "sweat the small stuff" as we sometimes say. You could just live in blissful ignorance of the problem and use Firefox. That's what I would do.