Solved Can't attach png images to posts

Thank you in advance.
Running Kunena 3.0.5 on joomla 3.3.1.

Forum won't allow pngs to be added as attachments.
There are no error messages. It just silently fails. Everything is set to allow png images and the attach file says png is a supported file type.
Joomla has no problem uploading png files.
I'm stumped. Any ideas?
Report attached. Also trying to attach a png here to see if it works.
Which it does.

Thanks for the help,
Eric

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Kunena menu details:

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ID	Name	Menutype	Link	Path
231	Forum	mainmenu	Itemid=256	kunena-2014-06-27
271	The Highway	mainmenu	view=category&catid=11	kunena-2014-06-27/the-highway
272	The Campfire	mainmenu	view=category&catid=139	kunena-2014-06-27/the-highway/the-campfire
273	The Fun House	mainmenu	view=category&catid=3	kunena-2014-06-27/the-highway/the-fun-house
274	The Courthouse	mainmenu	view=category&catid=6	kunena-2014-06-27/the-highway/the-courthouse
276	The Flume	mainmenu	view=category&catid=81	kunena-2014-06-27/the-highway/the-flume
277	Blazer Bob's Forum	mainmenu	view=category&catid=199	kunena-2014-06-27/the-highway/blazer-bob-s-forum
278	PacaMAM's Place	mainmenu	view=category&catid=204	kunena-2014-06-27/the-highway/pacamam-s-place
275	The Sports Field	mainmenu	view=category&catid=15	kunena-2014-06-27/the-highway/the-sports-field
279	The Kitchen Table	mainmenu	view=category&catid=23	kunena-2014-06-27/the-highway/the-kitchen-table
256	Forum	kunenamenu	view=home&defaultmenu=257	forum
257	Index	kunenamenu	view=category&layout=list	forum/index
258	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent
259	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic
260	No Replies	kunenamenu	view=topics&mode=noreplies	forum/noreplies
261	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest
262	Profile	kunenamenu	view=user	forum/profile
263	Help	kunenamenu	view=misc	forum/help
264	Search	kunenamenu	view=search	forum/search

Joomla default template details : mymountaintown | author: Eric May | version: 1.0 | creationdate: Unknown

Kunena default template details : NTS Kinfinite | author: Nice Theme Store | version: 3.5.0 | creationdate: 2013-05-25

Kunena version detailed: Kunena 3.0.5 | 2014-03-09 [ Invecchiato ]
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Kunena config settings:
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Kunena - AlphaUserPoints Enabled: activity=1 avatar=1 profile=1 activity_points_limit=0
Kunena - Community Builder Enabled: access=1 login=1 activity=1 avatar=1 profile=1 private=1
Kunena - Gravatar Disabled
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Joomla! languages installed:
en-GB	English (United Kingdom)

Third-party components: CommunityBuilder 1.9.1 | UddeIM 3.3

Third-party SEF components: None

Plugins: Search - Kunena Search 3.0.1 | Content - Kunena Discuss 3.0.1

Modules: Kunena Latest 3.0.1 | Kunena Stats 3.0.1 | Kunena Search 3.0.1

I fixed this. However, I'm not sure how or why it fixed it.
1) changed allowed images to "jpg,jpeg,png,gif"
it was "jpg,jpeg,gif,png"
2) I changed max upload size to 1000kb.
Although I don't understand why that wouldn't throw and error if that was the reason.

Figured I'd post this in case anybody else is having a similar issue.