So, I installed the newest version over the previous version and have been using it all day. Early in the day, I had 6 tabs open and went to refresh one of them and got a blank page. Not a 404 error, just a blank page.
So I tried refreshing another, same result.
I then opened the same 6 sites in firefox. I've been testing this behavior in both all day.
Whenever I have 5 or more tabs open in KM, occassionally this behavior occurs. It does not occur in FF.
I could not make it happen. I had nine tabs open and reloaded each twice and once I reloaded all together. Everything worked for me. KM 1.5.3 on XP-SP3.
maybe you have remnant files from 1.5.2 which can naturally cause some problems..try a clean install or new profile..backup your essentials as mentioned there:
http://kmeleonbrowser.org/forum/read.php?1,92190