Request URI too Large (414 Error)

I have a site which has been in operation for several years.  I am now getting 414 Errors - Request URI too Large -  from dyanamically generated pages.  No code changes have been made to the server.  I am looping over an array to build out a page. 

Here is some typical code:

<form action="#request.self#" method="">

        <table width="98%" border="0" cellspacing="0" cellpadding="2">

                <cfloop from="#evaluate(currentStartRow+1)#" to="#evaluate(currentStartRow+15)#" index="x">

                    <tr>

                        <td valign="top">

                            <select class="small" name="checkType#x#">

                                <cfloop list="#checkTypes#" index="y">

                                    <option value="#y#" <cfif allSteps.t is y>selected</cfif>>#y#</option>

                                </cfloop>

                            </select>

                            <select class="small" name="stepIsActive#x#">

                                <cfloop list="#stepStatus#" index="j">

                                    <option value="#j#" <cfif allSteps.i is j>selected</cfif>>#j#</option>

                                </cfloop>

                            </select>

                            <select class="small" name="method#x#">

                                <cfloop list="#methods#" index="jjj">

                                    <option value="#jjj#" <cfif allSteps.m is jjj>selected</cfif>>#jjj#</option>

                                </cfloop>

                            </select>

                         <textarea class="small" cols="62" rows="4" name="characteristic#x#">

                            #trim(allSteps.c)#

                          </textarea>

                            <input class="small" maxlength="30" name="zone#x#" size="22" value="#allSteps.z#">

                            <input class="small" maxlength="10" name="valueA#x#" size="8" value="#allSteps.a#">

                            <input class="small" maxlength="10" name="valueB#x#" size="8" value="#allSteps.b#">

                        </td>

                    </tr>

                </cfloop>

            <tr>

                <td align="center">

                    <input class="smallButtonGreen" type="submit" value="`save" name="save">

                </td>

            </tr>

        </table>

</form>  

If I set the loop counter lower the page processes.  If I comment out some of the content in the cfm file (meaning that the final page after processing is smaller) the page processes.  If I add  method= "post" the get a 500 Error.  Leaving out the method = "post" I get a 414 error.

The pages in question have not been updated for months and are used everyday.  This problem started two days ago.  Any ideas on how I can figure out this issue?

Thanks