I just had another page slow, first time with the new update, darn it ! Was hoping it was fixed. I had just been browsing the kindle store and opened a few samples to try them out, before reading a book, so maybe it just got overloaded.........anyway, the pages slowed just like before, didn't wait to see if it rebooted, just did a restart from the menu and it was okay after.
I have emailed the feedback email addy with the full details........not tried mine in the sun yet, haven't got any