Yeast Starter Blow Off

[Tpost704]

I am brewing a Hefeweizen for an upcoming wedding and created a 1L yeast starter using Omega OLY-021. I'm using a 2.5L flask on a stir plate with loose sanitized foil on top. When I got home from work, I noticed there was some slight blow off and some brown specs on the interior glass of my flask. I am assuming this is just yeast clumps. My question is how worried should I be about possible infection? Pic of starter below. Thanks.

 

[kh54s10]

If you had good sanitation and the foil was still over the top, you have little to concern yourself about. Brew on!

 

[Queequeg]

I have had it completely overflow before, still brewed good beer with it.

 

[MGamber]

It will be fine, that's happened to me a couple times. Eventually I started adding a drop of fermcap to my starters to keep the krausen down and it worked great.