Okay, here goes:

1. Current challenges do not display rank value on My Team page

I routinely create team challenges that run monthly. It is usually between the 10th and 15th before they display a value in the Rank column on the My Team page. However, it is not limited to just challenges I create. Here's a copy/paste of what I see currently:

Current Challenges 
Challenge Name: Challenge Type: Challenge Project: End Date: Rank: 
Bunny Race 2014 Points  All Projects 04/20/2014 5 
To Eliminate AIDS - Apr 2014 Points  FightAIDS@Home 04/30/2014  
MOT Apr 2014 Points Points  All Projects 04/30/2014  
MOT Apr 2014 Run Time Run Time  All Projects 04/30/2014  
MOT Apr 2014 Results Results Returned  All Projects 04/30/2014 

Only the last three are ones I created and only the first displays a rank.

2. The rank displayed on the My Team page for a challenge does not match that shown when viewing the challenge itself.

This is either a +1 or -1 difference and is intermittent in that it doesn't happen with every challenge. I do believe once a challenge is off, it remains off.

3. When submitting a challenge, I get an error about submitting the challenge twice.

I don't recall the exact error message but I can re-complete the Create screen and submit the challenge fine after the error.

4. I cannot create a challenge that starts more than 30 days in the future.

I can understand not wanting folks to create challenges that don't start until months from now but this is a real annoyance if you're trying to do one just a month ahead. As half the months of the year have 31 days, you can't create a challenge for the following month until the 2nd. I normally report on challenge results once they end. Since that is the last day of the month, that often happens on the 1st but I have to wait another day and come back to create my new challenges. Simply changing the limit from 30 to 31 days would solve this.

5. When inviting teams to a challenge, I have to enter them one at a time.

This isn't a problem if you're talking about one or two challenges with just a few teams invited. It quickly becomes impractical if you're dealing with a larger number of teams to invite or multiple challenges. The search field needs to be able to accept a list (CRLF delimited perhaps) then you simply check a box next to each result you want the invite to go to. I can nderstand that you may need to limit the numbe of items in the list (say 50) to prevent someone from trying to invite every team out there (or a lot of teams) but you could still do more than one search if you really do have more than 50 teams you want to invite.

6. I cannot invite a team to join a challenge after the challenge has been submitted.

I can see understandable reasons for not allowing a team to be added to a challenge that is active but if it is still before the start date of the challenge, shouldn't I be able to edit the challenge to invite an additional team?

This is all the comes to mind off the top of my head. There may be more bt these are the ones that stick out. I've sent emails more than once to the support id in the past, mainly for the first one. Seems that someone "kicks" something and clears it up for that month.

Whatever changed, we're used to silent changes and updates, the restart of client did not help, but manually clearing the cache and restarting firefox did return the header box. In fact, suddenly see Sign Out left top, two birds with one stone.

cheers