Question Kunena 1.6 errors

Hellow again. I make one back-up, I unistall all plugins or modules from kunena 1.5, bring down the legacy mode and reinstall Kunena 1.6 Beta 1, the result is:

No more 500 ERROR, but keep some conflict with template Javascript, then i change template and keep problems.
The Sef of Kunena just the same problem mysite.com/forum/5-londres.html is mysite.com/component/kunena/5-londres.html

I'm just using Joomla 1.5.20 (last version), upgrade from kunena 1.5.12 (last version), I use Joomla! natural SEF and no other rewrite or SEF components, and the only thing must have some problems with Kunena 1.6 is Jomsocial 1.8.3

Here's the new report:

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

Legacy mode: Disabled | Joomla! SEF: Enabled | Joomla! SEF rewrite: Enabled | FTP layer: Enabled | htaccess: Exists | PHP environment: Max execution time: 30 seconds | Max execution memory: 64M | Max file upload: 10M

Kunena version detailled: Installed version: 1.6.0-BETA1 | Build: 3068 | Version name: | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_title	Foro Viajeros
board_offline	0
offline_message	<h2>El foro esta actualmente Cerrado.</h2> <div>Dentro de poco Abrira.</div>
enablerss	1
enablepdf	0
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
jmambot	0
disemoticons	0
template	the_solid_blue
showannouncement	0
avataroncat	1
catimagepath	category_images/
showchildcaticon	1
annmodid	62
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	0
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
changename	0
pubwrite	0
floodprotection	0
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
imageprocessor	gd2
avatarquality	65
avatarsize	2048
allowimageupload	0
allowimageregupload	1
imageheight	800
imagewidth	800
imagesize	150
allowfileupload	0
allowfileregupload	1
filetypes	zip,txt,doc,gz,tgz
filesize	120
showranking	1
rankimages	1
avatar_src	jomsocial
fb_profile	jomsocial
pm_component	jomsocial
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	1
userlist_username	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_usertype	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
usernamechange	0
rules_infb	0
rules_cid	1
rules_link	www.kunena.com/
help_infb	0
help_cid	1
help_link	www.kunena.com/
showspoilertag	1
showvideotag	1
showebaytag	1
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	en-us
fbsessiontimeout	3000
highlightcode	0
rss_type	thread
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_word_count	0
rss_old_titles	1
fbdefaultpage	categories
default_sort	asc
alphauserpoints	0
alphauserpointsrules	0
alphauserpointsnumchars	0
sef	1
sefcats	0
sefutf8	0
showimgforguest	1
showfileforguest	1
pollnboptions	4
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	old_ord
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
js_actstr_integration	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
integration_access	auto
integration_login	auto
integration_avatar	auto
integration_profile	auto
integration_private	auto
integration_activity	auto
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	1
showpopthankysoustats	1
popthankscount	5
mod_see_deleted	0

Also must say in the report page i see this message:
Notice: Undefined property: stdClass::$versionname in /myhost/mysite.com/administrator/components/com_kunena/admin.kunena.php on line 3056

SEF problems - just search this site and you'll see we've had hundreds of them - shouldn't be that difficult. If you browse through some of the SEF-related discussions that I've been involved with, we've fixed more problems than we haven't fixed. SEF problems are usually caused by trying to be too clever. Keep it simple!

If the "undefined property stdClass::$versionname" is a new error, please start a new thread about it.

Our advice is to use JomSocial 1.8.7.

Except for this new "undefined property" problem, have all the problems that you originally reported now been fixed?

Please important advice for K 1.6 users about Legacy Mode

Already fixed for K1.6.0RC2:

Notice: Undefined property: stdClass::$versionname in /myhost/mysite.com/administrator/components/com_kunena/admin.kunena.php on line 3056