It happens to the best of us - mistakes get made, people find them and report back to me.
Below is a list of typos that made it into the finished versions of my designs -
Note: if you purchased either of these patterns after March 2004, your pattern is correct.
Ostrich Plumes Square Shawl
There is an extra YO on line 1 of the written instructions - ignore the first YO. The chart is fine.
Ostrich Plumes Triangle Shawl
The number of plain Knit stitiches between the edge and center YO's on rows 23, 27, and 31 should be 23,
27 and 31, respectively. The chart is fine.