That is quite interesting as I get the following with 4.50 and 4.52rc1:

c:\data\scripts>..\kix\kix.450\kix32 compareversions.kix

No upgrade necessary
FALSE - 8.0.0.912 < 8.0.0.912

False - "10.0.1.123" < "10.0.1.9"
True - "10.0.1.123" > "10.0.1.9"
False - "10.0.1.123" = "10.0.1.9"

Just in case I changed something in the UDF I will repost it.

Code:
function CompareVersions($version1, $comparison, $version2, optional $split)
    dim $Ver1array, $Ver2array, $Ver1arrayCnt, $Ver2arrayCnt
    dim $index, $maxindex

    if VarTypeName($split) <> "String"  $split = "." endif

    $Ver1array = split($version1, $split)
    $Ver1arrayCnt = ubound ($Ver1array)

    $Ver2array = split($version2, $split)
    $Ver2arrayCnt = ubound ($Ver2array)

    Select
        case $Ver1arrayCnt <= $Ver2arrayCnt
            $maxindex = $Ver2arrayCnt
            redim preserve $Ver1array[$maxindex]
        case $Ver1arrayCnt > $Ver2arrayCnt
            $maxindex = $Ver1arrayCnt
            redim preserve $Ver2array[$maxindex]
        case 1
            ;something is wrong
    EndSelect

    $CompareVersions = 1
    for $index = 0 to $maxindex
        dim $difference

        $difference = val($Ver2array[$index]) - val($Ver1array[$index])

        Select
            case $comparison = "="
                if $version1 <> $version2
                    $CompareVersions = 0
                    $index = 1+$maxindex
                endif
            case $comparison = "<"
                if $difference < 0 or $version1 = $version2
                    $CompareVersions = 0
                    $index = 1+$maxindex
                endif
            case $comparison = ">"
                if $difference > 0 or $version1 = $version2
                    $CompareVersions = 0
                    $index = 1+$maxindex
                endif
        Endselect
    next
endfunction
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