Is there a restricted combination on Item Types in Virtual Folders?

Question

So if I have two virtual folders, one listing localized 1 keywords (and categories) and the other listing localized [2] components I'd figured I could combine the two as below:

<SearchFolder xmlns="http://www.tridion.com/ContentManager/5.1/SearchFolder" xmlns:xlink="http://www.w3.org/1999/xlink">
    <GeneralParameters>
        <SearchQuery></SearchQuery>
        <SearchIn xlink:href="tcm:0-[pubID]-1" Recursive="true"></SearchIn>
    </GeneralParameters>
    <AdvancedParameters>
        <ItemTypes>
            <ItemType>16</ItemType>
            <ItemType>512</ItemType>
            <ItemType>1024</ItemType>
        </ItemTypes>
        <BluePrinting StatusType="Localized">
            <Publication xlink:href=""></Publication>
        </BluePrinting>
    </AdvancedParameters>
</SearchFolder>

Unfortuantely the above only lists the Categories and Keywords and ignores components.

When I select the edit the details again I can see that all three are selected... looks like a defect to me but wanted to check if I've missed something in the setup / documentation here.

Update (added detail)

1 Item types used for Categories and Keywords

<SearchFolder xmlns="http://www.tridion.com/ContentManager/5.1/SearchFolder">
<GeneralParameters>
    <SearchQuery></SearchQuery>
    <SearchIn xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tcm:0-xxx-1" Recursive="true"></SearchIn>
</GeneralParameters>
<AdvancedParameters>
    <ItemTypes>
        <ItemType>1024</ItemType>
    </ItemTypes>
    <BluePrinting StatusType="Localized">
        <Publication xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href=""></Publication>
    </BluePrinting>
</AdvancedParameters>

2 Item types used for Components

<SearchFolder xmlns="http://www.tridion.com/ContentManager/5.1/SearchFolder" xmlns:xlink="http://www.w3.org/1999/xlink">
<GeneralParameters>
    <SearchQuery></SearchQuery>
    <SearchIn xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tcm:xxx-x-2" Recursive="true" xlink:title="Building Blocks"></SearchIn>
</GeneralParameters>
<AdvancedParameters>
    <BluePrinting StatusType="Localized">
        <Publication xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href=""></Publication>
    </BluePrinting>
</AdvancedParameters>

3 Item types used for Components and Keywords

<SearchFolder xmlns="http://www.tridion.com/ContentManager/5.1/SearchFolder">
<GeneralParameters>
    <SearchQuery></SearchQuery>
    <SearchIn xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tcm:0-xxx-1" Recursive="true"></SearchIn>
</GeneralParameters>
<AdvancedParameters>
    <ItemTypes>
        <ItemType>1024</ItemType>
        <ItemType>512</ItemType>
        <ItemType>16</ItemType>
    </ItemTypes>
    <BluePrinting StatusType="Localized">
        <Publication xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href=""></Publication>
    </BluePrinting>
</AdvancedParameters>

Answer 1

There are no restrictions that I know of. I've just tried it on my own system and it worked fine.

You can always create the virtual folder by first doing a Search within the CME and then saving it as a Search Folder. That way, you know that there aren't any issues in the XML.