I think the "socialization" myth has been overblown for years. Most homeschoolers I've known (and I've known a LOT in more than 22 years since I first became a homeschooler) are very well-adjusted and get along with homeschooled and non-homeschooled peers very well.
Once in awhile, you do get funny little glitches, though. Not serious, just funny. For example, as a high school student who did most of my studies independently, I had a few occasions of embarassment when I didn't have a clue about how to pronounce a word or name. The most striking example was during the time I was attending classes at Kolbe Academy once a week and doing the rest of my studies on my own at home. (Kolbe Academy was about a two hour drive for us each way, including a drive through San Francisco and across the Golden Gate Bridge). At that time, a music professor from the University of San Francisco, Maestro Golfredo Corradetti (I hope I got the spelling right) was teaching a music appreciation class at Kolbe. He was a wonderful teacher and had fabulous stories to tell. Anyway, one day we were studying Richard Wagner. All I can say in my defense is, how was I supposed to know that his name was pronounced Reekard Vogner??? (heehee)
I was quite amused to read awhile back on Melissa Wiley's blog about how her children didn't understand the coloquial meaning of the word "duck". I happened to notice this summer that at least one of my kids (Terri) had the same problem. I said, "duck" and she looked around, asking, "where?"
I'm still laughing about this one, though... Yesterday I said something silly about going home after church and "dressing like slobs". Ria and Gus both thought I said, "dressing like Slavs."