While bad code may be the culprit on some pages, Safari is not hugely Myspace-friendly. On some friends pages, their background image is only in the margins, while viewing the same page on a PC (IE) shows the whole pic in the background of the profile. I've also had trouble putting my own code into my profile through Safari. In some cases, when I've added HTML through Safari, the page doesn't come out like it should. However, if I add the same code in IE through my PC, it comes out fine (and is then perfect when viewed on Safari).
If you've ever tried to leave a comment on someone's blog, you'll notice a window come up saying something to the effect of the function not supporting your browser. You have to click on a separate link to be brought to another page. Also, if you've ever posted a blog yourself, it won't let you use the advanced editor (once again becuase it does not support Safari), and your apostrophes and quotations will often read as commas and semi-colons after Myspace converts everything to proper HTML code for display. After you post your blog, you have to go in to the code that Myspace generated and fix all of these puncuations and then post them inside the code. There is no reason that Myspace shouldn't permit apostrophes without code, but does so with code.
Basically, some discrepancy happens when HTML code is either added by the user through Safari, or is generated by Myspace when someone enters in text through Safari that Myspace needs to auto-code. Don't know why...