Explanation

The tables below show a bug in Internet Explorer. All tables are defined as 250px wide, but the last table is significantly wider. The contents of the input field cause both the field and the surrounding table to grow.

Demonstration

250px wide table, no input field
abc
250px wide table, with input field
250px wide table, with input field with a long value
250px wide table, with input field with width:100%
250px wide table, with input field with width:100% and a long value