weird issue, seems to be a known issue with CSS floating elements and IE7/8 - known as peekaboo issue, basically between page loads, such elements (in this case login form box) can disappear and reappear
Trying all sort of fixes for now heh.
edit: okay seems i fixed it for IE7 at least, Tim and others using IE7 and IE8 browsers can you confirm when logged out you always see top right header login box ?
some stats on browser usage on i4memory.com
Code:
1 Firefox 3.6 39%
2 Internet Explorer 8 21%
3 Chrome 4.0 9%
4 Firefox 3.5 7%
5 Opera 10.0 6%
6 Internet Explorer 7.0 5%
7 Internet Explorer 6.0 3%
8 Firefox 3.0 2%
9 Identification Blocked 2%
10 Safari 4.0 2%
11 Chrome 5.0 1%
12 Iron 4.0 4.0 <1%
13 iPhone 3.1 <1%
14 Firefox 2.0 <1%
15 Opera 9.6 <1%
16 Mozilla 1.9 <1%
17 Rippers <1%
18 Chrome 3.0 <1%
19 iPhone 3.0 <1%
20 Opera Mini 5.0 <1%