AD User Credential Prompts in SD 7.5 SP1?

I have two completely separate environments upgraded to ServiceDesk 7.5 SP1 and I've been noticing a couple of user experience things for user accounts synced from AD:

1. When first clicking on tasks the authentication (username/password) form is sometimes visible for 3-4 seconds and then it passes through to the next form.  This did happen in prior versions at times but seems to linger a little longer in SP1.
2. Users logging in from computers not on the same domain as the ServiceDesk server get prompted for credentials on triggering workflows if they use the login format [domain]\[username] to access the Process Manager.  If they use their e-mail address this does not occur.

In both cases this is intermittent otherwise I would have logged a case with support.

I thought I'd mention it in case anyone else is seeing the same sort of thing?