Visual Studio :: Inordinate Pauses When Indenting Lines Of HTML?

An example: I have a fairly simple "contact us" kind of HTML form. No controls, just straight HTML, total size of aspx file is 570 lines. There is a Country drop-down list, with roughly 240 lines of "<option value="..">..</option>, one for each country.

Say I need to change the indent of those option lines. I select all ~240 of them, hit TAB and.... wait.

and wait...

and wait...

Finally, VS recovers from whatever trauma I've inflicted upon it, having successfully indented the lines. We actually have other coders getting up with an audible sigh, and going to make coffee in frustration while this sort of thing happens. Just from changing the indent of a bunch of HTML. It also happens when doing a find & replace on that same selection of 240 option lines... huge pause!

Would something be wrong with our setup? Some options (HTML intellisense-related perhaps) which we can adjust so VS doesn't go catatonic when we simply want to change indent? I've resorted to pasting stuff into TextPad, doing the indenting/replacing/whatever, then pasting it back into VS. That can't be an industry standard practice, I can only assume something is off with our installs.

VS's reaction reminds me of Kylie from Fantastic Mr Fox. Select some HTML, hit TAB and...