Some hechshers have the designation "DE" for "Dairy Equipment." Do those who keep Cholov Yisroel eat food with this designation? (I am mostly talking about the minority who consider [American] cholov stam to be treyf. I am guessing there would be no problem with this for others, particularly those who eat K-DE after a meat meal without waiting.)
The Rama writes (in Yoreh Deah 115:1):
חָלָב שֶׁל עוֹבְדֵי כּוֹכָבִים אוֹסְרִים כֵּלִים שֶׁנִּתְבַּשְּׁלוּ בָּהֶם כִּשְׁאָר אִסּוּר, אַף עַל פִּי שֶׁאֵינוֹ רַק סָפֵק שֶׁמָּא עֵרֵב בָּהּ דָּבָר טָמֵא.
Milk of a non-Jew makes vessels non-kosher when they are cooked in them, just as any prohibited food, even though this is only an uncertainty whether he has mixed in something non-kosher.
According to those who says that modern Chalav Stam is Treif, there's (presumably) no difference between the olden-day Chalav Akum and modern day.
It seems from this page that most people who keep cholov yisroel are not makpid about keilim:
Many who observe the halacha in this manner, are nevertheless lenient with the blias of chalav stam. This was the opinion of Rav Yaakov Kamanetsky and many other American gadolim who, though they only consumed only chalav Yisroel, were not strict about food cooking in pots previously used for non-chalav Yisroel dairy.
However, I can vouch that Chabad is indeed strict on this issue, and thus does not permit products marked K-DE. I would imagine that other Chasidic groups, in particular, would also be stringent on this, but I don't know which ones.