Created an attachment (id=5103)
ReactOS revision: 47338
Computer: Intel desktop board D845HV, Pentium4 1.6Ghz, 128Mb ram
Opening an html document in FireFox 3.5.5 I found that only parts of the page are rendered, mainly the headings.
When viewing the source in the bowser I find that a lot of tags are empty.
Attached debug log and screenshot.
The same file renders correctly in FireFox 2.0 and the source is displayed as expected.