Several times each day, YouTube actually shuts down a lot
of their servers in order to update things like the home-page
and "search results".
Everytime when you go to YouTube, they are sending 100's
of little data packets to your computer -- each packet being
a "blob" of info (like chunks of text, links, thumbnails, icons,
HTML codes, etc). But when YouTube shuts down some of
those servers, that's when you're likely to see bits & pieces
of plain-looking text, graphics and thumbnails in odd places.
This usually fixes itself relatively quickly.
Sometimes things resolve themselves right away by simply
pressing the "F5" key or your browser's "Refresh" icon. The
best way to determine if this is the actual problem is if your
channel looks absolutely normal despite what is happening
on other YouTube pages.
If your YouTube continues to behave weird - stuck - strange,
it's possible that your directories of "temporary internet files"
and RAM (sometimes called "cache") are at their max, and
cannot take any more -- the end result being that nothing is
in its proper place.
"Temporary internet files" are tiny bits of webpages that get
permanently put on your hard-drive. They will remain forever
on your computer, gradually plugging it up like hair stuck in
a sink drain, until you finally get rid of them once and for all.
Thus, exit out of YouTube, then clear your "cache" of all its
"temporary internet files", "cookies" and "history". It is best
if you shutdown and reboot afterwards. You'll be amazed at
how "fresh", "new" and "fast" your YouTube will be:
Internet Explorer 6:
→ Tools → Internet Options
→ Delete Cookies → OK
→ Delete Files → OK
→ Clear History → Yes
Internet Explorer 7:
→ Tools → Internet Options → Delete...
→ Delete files → Yes
→ Delete cookies → OK
→ Delete history → OK
→ Close (browsing history window)
Internet Explorer 8:
→ Tools → Delete Browsing History
[. ] Preserve Favorites (leave blank)
[x] Temporary Internet files
Mozilla Firefox 3:
→ Tools → Clear Private Data
[x] Browsing History
[x] Download History
[x] Saved Form and Search History
→ Clear Private Data Now
Apple Safari 3:
→ Edit → Preferences
→ Security (tab) → Show Cookies
→ Remove All → Done
→ Safari → Empty Cache → Empty
→ History → Clear History
→ Tools (wrench) → Clear browsing data...
[x] Clear browsing history
[x] Clear download history
[x] Empty the cache
[x] Delete cookies
Clear data from this period: → Everything
→ Clear Browsing Data
I hope that my information proves to be a little helpful to you.